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Southern Regional Power Committee Bengaluru

Minutes of the 136th Meeting of Operation Coordination Committee

held at Hyderabad on 09.10.2017

1 Introduction

1.1 The 136th Meeting of Operation Coordination Committee was conducted at Hyderabad on

09th October 2017. The list of participants is furnished at Annexure-1A.

1.2 Shri V Sekhar, ED, SR I welcomed all delegates from power sector family of SR to the 136th

OCC Meeting being held at Hyderabad. At the outset he thanked Member Secretary, SRPC

for having given SR-I the opportunity to host the meeting. He expressed that Team

Powergrid is making all efforts to make the meeting successful. SR as a Region has many

systems with a number of complex issues and number of stake holders having diverse

interests. SR Demand was touching about 40,000 MW and OCC forum is a good

enabler/coordinator to resolve issues with the objective that end consumer receives his

share of power with least disturbance. He stated that Shri S R Bhat, MS SRPC has exhibited

excellent and dynamic leadership. The meetings are regularly conducted with a objective

and result oriented approach. Powergrid is also inspired to add new elements/assets to the

SR Grid to ease the power situation by enabling more power. All the utilities have a daunting

task ahead. Though October to December may be a lean season but from January 2018 it

may be a challenging task to manage the grid with proper LGB. He informed that

instructions to the concerned officials have communicated to ensure that all maintenance

works on crucial elements like Talcher-Kolar, Raichur-Sholapur etc completes before

January 2018. Many construction works are going on under Powergrid and thus some of

the shut downs are unavoidable. He appreciated the role of OCC in harmonizing such type

of shut downs. He listed out the major assets which are under construction nearing

commissioning:

Removal of constraints at Vemagiri would be completed by mid of November 2017

765/400 kV ICT at Cudappah, LILO of 765 kV line Kurnool-Thiruvalam at

Cuddapah and 400 kV lines from N P Kunta to Cuddapah and line from N P Kunta

to Hindupur.

4th ICT at N P Kunta. LILO lines are almost in completion stage and will be ready

for commissioning by December end.

Expediting to completing the line from Srikakulam to Garividi.

Shri S R Bhat, MS, SRPC extended a hearty welcome to all the delegates to the 136th OCC

meeting. He thanked Shri V Sekhar, ED, SR I for kindly agreeing to host the Meeting at

Hyderabad. He stated that he cherished his leadership and observed that entire team of SR

I is working dedicatedly in mission mode.

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On the Grid Operation side he stated that there are many matters to be addressed and

listed out the following:

Coal Shortage is one of the very serious issues being faced by SR Generators.

SRLDC had also issued a letter to the generators regarding the coal issues.

Chairperson SRPC had already taken up the issue with MoP highlighting the critical

coal stock position of SR Generators. Some policy change had also been requested

like allowing for imported coal etc in view of the existing alarming situation.

PX prices are on the upward trend. CEA had issued one letter on this matter and

had sought the action plan. The issue had been deliberated in depth in the last OCC

Meeting and recommendations/action plan finalized had already been communicated

to CEA.

Possibility for increasing the hydro generation is to be explored as suggested by

CEA.

Complexion of hydro position had changed compared to last month and last year.

Reservoirs are getting filled as there were good rains and inflows compared to last

year.

Considering the five months ahead forecast how load and generation can be

managed on a day to day basis is to be discussed in due course of the Meeting.

A Special Meeting to finalize the phasing plan of Thermal Units for implementation of new

environmental norms was conducted in SRPC on 18th September 2017 with participation of

various stake holders including CEA. Draft Plan for FGD implementation and Phasing Out of

units had been frozen some of the generators had expressed concern/difficulty in getting

approvals and arranging funds etc. In view of the time bound nature and its criticality

Chairperson, SRPC had requested Chairperson, CERC that the concerns expressed by the

generators may kindly be arranged to be examined.

SRLDC had taken good initiative and two RGMO Meetings had been conducted, one with

Tamil Nadu and another with ISGS/ISTS connected IPPs. Action points/suggestions had

been communicated to the concerned immediately after the Meetings. He thanked all the

generators for the cooperation extended and opined that further improvement in

performance was required. As per recent orders, RGMO performance of all generators’

would be under watch of CERC from 1st September 2017. It becomes more imperative for all

to achieve the desired performance.

A mock test had been conducted to see the efficacy of Talcher-Kolar SPS. This is an

ongoing exercise to test the readiness of the SPS in case of eventualities.

MVAR capability test at BTPS was carried out while the MVAR testing at Kaiga was pending

for some time.

1.3 SE (O), SRPC took up the Agenda for discussions.

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2 Confirmation of the Minutes of the 135th Meeting of OCC of SRPC held on 12thSeptember

2017

The Minutes of the 135th OCC were confirmed.

3 ISGS/CGS

Planned Outages of CGS/ISG stations approved for the month of October/November 2017 are

enclosed at Annexure-3A.

3.1 Rescheduling/ Planned outages of Generating Stations

3.2.1 Neyveli TPS II-Planned Maintenance of Unit-7

In the 135th OCC Meeting held on 12.09.2017 approval was given to take out Unit -7 of TPS II

for 21 days from 23.9.2017 for Annual Overhaul works. NLC vide letter dated 26.09.2017

(Annexure-3B) informed that as there was slight delay in award of contract for the works, the

planned shutdown could not commence on the approved date. The unit was planned to be

taken out of bars for planned works from early hours of 29.09.2017.

3.2.2 Rescheduling of Overhauling

In the earlier OCC Meetings it was emphasized that the maintenance schedule firmed up in

OCC needed to be adhered by the generators since it had LGB, commercial, ATC/TTC, market

and grid security implications. All generators needed to plan the maintenance and have periodic

preliminary review meeting with the OEM / Maintenance Agency to avoid any rescheduling.

Any unilateral decision by the generator could be considered as violation of IEGC.

3.2.3 Non-adherence to maintenance schedule in case of Talcher Unit-III

3.2.3.1 KSEBL vide E-mail dated 05.09.2017 had expressed concern regarding the non-adherence of

maintenance schedule of Talcher Unit III. KSEBL had expressed serious concern regarding

the repeated change in schedule of Talcher Unit III Annual Maintenance Works.

3.2.3.2 Chairperson, SRPC vide letter dated 13.09.2017 had taken up the issue with CMD, NTPC and

had requested to kindly use his good offices to look into the matter urgently and arrange to

give strict instructions to the concerned to strictly adhere to the finalized Maintenance

Schedule. Also it was requested that in case it was necessary to shift the schedule on account

of any reason, the same needs to be done in close consultation with states/RLDC/SRPC.

3.2.3.3 Subsequently NTPC vide letter dated 11.10.2017(Annexure-3C) had assured that in future,

NTPC would adhere to maintenance schedule as decided amongst the constituents in the

OCC Meeting.

3.3 ISTS/State Sector Transmission Lines and Elements Outage proposals for the months of October/November 2017 in respect of Central and State

Transmission lines and elements were approved and posted on SRPC website

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(http://www.srpc.kar.nic.in/website/2017/operation/plout136occ.xls). All utilities are to submit

the S/D proposals for the subsequent month by 3rd of the current month. Shutdown requests

for the same month needed to be avoided. An outage coordination group had been created

(sr_outage_coordiantion@googlegroups.com) for review of the previous OCC approved shut

downs (construction/critical).

3.4 Non-availing the OCC approved shut downs

3.4.1 In earlier OCC Meetings, SRPC & SRLDC had stated that in spite of huge efforts being put

into finalizing the shutdown approvals, non-availing of the same was a matter of serious

concern. Power purchase by the states was also being planned based on these approved

outages and any changes may affect their LGB and in some cases ATC/TTC was also getting

affected. It was agreed that SRLDC would post the approved outages availed and non-availed

by 3rd of every month. Subsequently constituents should revert back with the reasons for non-

availing the shut down by 6th of every month.

3.5 Number of Outages approved V/s Availed

3.5.1 Status of shut down availed against shut down approved as furnished by states is as below:

3.5.2 SRLDC presented the status of availed shut down vs approved shut down state wise and for

the Region as per the information available with them (Element wise information is at

Annexure-3F) as follows :

AP KAR KER MTL NTPL UPC

L

NTPC SR I SR II TN TS SR

58.6 100 100 100 0 0 100 84.2 57.1 69 42.9 68.1

State/Utility AP TS KAR KER TN SR I SR II

No of shut downs approved

29 08 6 16 29 26 16

No of shut downs carried out as per schedule

17 05 6 15 21 3 11

No of shut downs deferred

12 03 0 1 08 23 5

Percentage of shut down carried out

59 63 100

94 72

88 (Annexure-3D)

69 (Annexure-3E)

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3.5.3 In the Meeting, SRLDC informed that in the analysis they had put an effort to incorporate

comments received from constituents/Powergrid/Generators. It was observed that the availed

percentage was around 70 %.

3.5.4 SR I informed that two shutdowns (Kolar ICT I and Thiruvalam-Sriperumbudur) were not

availed on account of rains. Bidadi-Tumkur-II line S/d was not availed due to site constraints.

Palakkad-Udumalpet-II shutdown was not availed due to OEM Manpower constraints and

Kudankulam APP-Tirunelveli PG-III & IV due to ROW issues (High Court stay not vacated at

01 No tower location). GM, SRLDC felt that deferring of S/d referring manpower constraints is

not in order since approval for the shut down is received one month or more ahead and

requested to ensure that at least in future manpower is available on approved dates.

3.5.5 APTRANSCO informed that two shutdowns (400 kV Kadappa PGCIL and 315 MVA ICT at

VTPS) were not availed on account of heavy rains. Revised approval was taken for Kalpakka-

Asupakka line (after LILOing) and was shown twice. Out of 29 approved 19 S/ds were carried

out. GM, SRLDC requested APTRANSCO to adhere to the schedules. Particularly over

loading at Kalpakka area affects ATC/TTC calculation also.

3.5.6 TSTRANSCO informed that out of 8 approved 5 had been availed. Gazwel ICT S/d was

availed on different day. Malkaram-Ramagundam and Shankarapally lines were deferred by

SLDC because of system constrains (line loading). GM, SRLDC stated that shut downs were

requested by TSTRANSCO after system studies/demand side management and deferring the

same because of system constraints are not understood and requested TSTRANSCO to avoid

such instances.

3.5.7 TANTRANSCO informed that 3 LCs were not availed because of system constraints/rainy

season and D-3 intimation had been given. Two LCs were availed on OSD. GM SRLDC

requested TANTRANCO to mention the system constraints specifically and also requested to

stick to the schedule.

3.5.8 MS, SRPC requested that all efforts should be made to minimize the deviation from schedule

as during any unforeseen contingencies, outages (unplanned/emergency) are scrutinized and

viewed closely. The issue should to percolate to the operating level/ working level it should be

emphasized that they should not deviate from the approved schedule.

3.5.9 SRPC/SRLDC pointed out that few constituents/utilities were not furnishing outage requests

as per specified time schedule and current month proposals for AMP works were also being

furnished. All the utilities were requested to follow the procedure and the time lines.

3.5.10 All utilities were requested to furnish the details/deviations with respect to their Annual Outage

plan schedule vs maintenance carried out on a monthly basis since this information is required

for the Annual Outage Plan Deviation Report being submitted to CERC.

3.5.11 SRLDC informed that only emergency shut downs are being applied through web based

system by APTRANSCO and requested to upload OCC approved shut downs also. On D-3

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basis request to be uploaded and if not availing reason should be mentioned. APTRANSCO

informed that this issue already been noticed and they have started to follow the approved

procedure.

3.5.12 SRPC/SRLDC felt that at present APTRANSCO SLDC have stabilized at Vijayawada and

should try to adhere to all requirements mandated for smooth operation of Grid with proper

communication with the concerned.

3.6 LGBR for upcoming five months & TTC/ATC computations

3.6.1 All states were to furnish PSSE base case for February 2018 and the following was noted:

State 5 months LGB

Converged PSSE Base case

ATC/TTC Computation furnished to SRLDC

ATC/TTC Computation posted on SLDC website

Nodal Officer Status

AP Being Furnished

Not submitted

No Nil No

TS Submitted Yes

KAR Submitted No

TN Submitted Yes

KER Submitted Yes

3.6.2 In the Meeting, the following was noted:

APTRANSCO informed that manpower shortage persisted. The issue had already been

apprised to Higher Bodies. Recruitments are over but posting is not yet carried out. GM,

SRLDC requested APTRANSCO to follow up the issue.

KPTCL informed that Nodal Officer had been identified and the name and contact details

would be shared. Subsequently the information had been submitted by KPTCL (Annexure-

3G)

SRLDC/SRPC pointed out that the demand being furnished for POC, ATC and LGB should

be in synch with each other. Different values should not be furnished for different

requirements. Node wise data should be as per the demand which is likely to be met from

various sources keeping in view the MOD etc. Any tendency to increase the internal

generation for POC computation needs to be avoided.

4 Availability and Requirement

4.1 APTRANSCO informed that they were not anticipating any deficits till January 2018. Bundled

power of 386 MW (8.34 MU) is considered from 21.07.2017 onwards. RTPP Stage IV (New)

generation was also expected from November 2017(5- 11 MU). Hinduja is considered only in

October 2017. GVK, Spectrum and LANCO (gas stations)are also scheduled.

4.2 TSTRANSCO informed that they would be in deficit in the coming months. Around 17-23 MU

per day is expected from SGPL. Around 20 MU purchase from CSEB was in place. Deficits, if

any would be met through STOA/PX purchases. 12 MU is kept as Spinning Reserve. The

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deficit is increased due to increase in requirement due to extension of 24 hours power supply to

3 districts & LI Loads.

4.3 KPTCL informed that they would be in deficit during October 2017 to February 2018. DVC

power of around 318 MU is considered in the availability. Peak energy growth is considered

with 5% increase from 2016-17

4.4 KSEBL informed that they would be in nominal deficit for the coming months. It was noted that

PX purchases and Kayamkulam Power are not considered in the availability.

4.5 TANTRANSCO informed that they are anticipating surplus from October 2017 onwards.

LTA/MTOA of around 1,800 MU is considered. Wind generation is expected to be around 700

MU in October 2017 and expected to decrease gradually and in February 2018, 200 MU was

anticipated. Around 200 MU is expected from Solar.

4.6 MS, SRPC stated that more emphasis needed to be put in by all the concerned utilities to

finalize a realistic load generation balance.

4.7 Reasons for demand -supply gap and its variation

MoP/CEA specifically needed the reasons for load shedding like transmission constraints,

distribution constraints, regulatory constraints viz the power purchase not allowed beyond an

agreed cost or quantum, natural calamities, tripping of some of major transmission lines etc.

All the constituents to furnish the information in the specified format. Even if load shedding is

zero a ‘Nil’ report needed to be furnished on monthly basis

5 REVIEW OF THE POWER SUPPLY POSITION

Grid Highlights

Frequency remained within IEGC range during September 2017 (49.90 - 50.05 Hz) for

77.29 % of time. Average frequency for the month was 49.98 Hz.

Frequency remained below 49.90 Hz for 14.75 % of time during September 2017.

Frequency remained above 50.05 Hz for 7.96 % of time during September 2017.

Black Start Restoration Workshop for Karnataka Completed on 08th September 2017 at

BTPS.

Black Start Restoration Workshop for Telangana Completed on 22nd September 2017 at

KTPS.

MVAr Capability Testing of BTPS completed on 09th September 2017

RGMO Meeting completed for TN on 25th September 2017 and CGS on 27th September

2017.

Andhra Pradesh, Telangana, Karnataka, Kerala & Tamil Nadu Imported 430 MU, 784 MU,

2.50 MU, 6.11 MU & 980 MU respectively intra-regionally through bilateral exchanges.

Andhra Pradesh, Telangana, Karnataka & Tamil Nadu exported 1435 MU, 18 MU 5 MU &

744 MU respectively intra-regionally through bilateral exchanges.

Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala,Tamil Nadu &

Puducherry imported 136 MU, 470 MU, 146 MU, 62 MU 323 MU & 01MU respectively

through Power Exchange.

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Utilities located in Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil Nadu,

MEPL,TPCIL, CEPL, IL& FS & SGPL Unit I exported 64 MU, 31 MU, 224 MU, 4 MU, 24

MU, 34 MU, 47 MU, 23 MU, 173 MU & 1respectively through Power Exchange.

SR I, Power grid vide letter dated 26.09.2017 (Annexure-5A) had informed that consequent

to the successful completion of Trial Operation, the following assets under transmission

system associated with “Eastern Region strengthening Scheme-IX” have been put under

Commercial Operation w.e.f 00:00 hrs of 27th September 2017 in terms of clause 4 of

CERC (Terms and Conditions of Tariff Regulations, 2014).

400kV, 1 x 125 MVAr, Bus Reactor at Gazuwaka (East bus) along with

associated bays and equipments.

Transmission charges for the above assets are payable w.e.f 27th September 2017. SR I, Power grid vide letter dated 20.10.2017 (Annexure-5B) had informed that consequent

to the successful completion of Trial Operation, the following assets under transmission

system associated with “Provision of line bays for the scheme – Connectivity lines for

Maheshwaram (Hyderabad) 765/400 kV Pooling Station” have been put under Commercial

Operation w.e.f 00:00 hrs of 21st October 2017 in terms of clause 4 of CERC (Terms and

Conditions of Tariff Regulations, 2014).

2 Nos. of 400kV GIS line bays at Nizamabad (PG) for termination of

Nizamabad – Yeddumailaram (Shankarpalli) 400kV D/c line..

Transmission charges for the above assets are payable w.e.f 21st October 2017

.Installed Capacity (MW) addition in respect of RE during the month of September

2017

Renewable

Energy Sources

Andhra

Pradesh

Telangana Karnataka Kerala Tamil

Nadu

Wind (State) 0 0 0 0

Wind (Private) 4.2 0 0 0 30.85

Solar (State) 0 0 0 0

Solar (Private) 0 129.15 0 0

Co-generation

Bio Mass 0 0 0 0

Bagassee 0 0 0

Mini Hydro 0 0 0 0

Others 0 0 0

CPP

Total 4.2 129.15 0 0 30.85

6 MAJOR ISSUES 6.1 Presentation by States on Operational Issues

In the Meeting, it was noted that all the States/Entities submitted the operational issues /

highlights (Annexure-6A). SRLDC requested that states may kindly upload their presentation by

5th of every month so that SRLDC can compare with their information/data which will help in

better discussion/analysis of the issues.

6.2 Critical Coal stock position in SR and LGB for the coming months

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6.2.1 In the 135th OCC Meeting, it was noted that CEA had sought the steps to enhance the availability

in Southern Region. The prices in power exchanges spiked up during peak hours. Thermal plants

are running at alarmingly critical coal stock position. The issue had been deliberated in detail in

the Meeting and recommendations finalized after discussion was forwarded to CEA.

6.2.2 Subsequently CEA vide letter dated 22.09.2017(Annexure-6B) had further communicated in this

regard. The following was noted:

Average price of power in the Power Exchange in the current month(September 2017) has

been consistently on the higher side, due to high demand and less availability. The peak

hour Market Clearing Price (MCP) has touched Rs. 9.9 /Unit during last week.

Decreasing trend in hydro generation is observed in the country in the month of September

2017.

The same situation is likely to persist in the near future.

Due to the upcoming festive season, demand is likely to increase thereby straining the load

generation balance.

It is reported that some of the thermal units are facing severe coal shortage.

CEA desired that States may kindly be advised to mobilize all the required resources in order to

meet the expected high demand. RPCs were also requested to prepare the plans for meeting the

contingency and send the same to CEA within three working days.

6.2.3 SRPC vide letter dated 26.09.2017(Annexure-6C) had furnished the reply to CEA. SRPC vide

letter dated 26.09.2017(Annexure-6D) had taken up the issue with all concerned at TCC Level.

The following was noted:

The issue of critical coal stock has been taken up with MoP by Chairperson SRPC 25.09.2017(Annexure-6E). It had been requested that GENCOs be permitted to avail imported coal, till mandatory stocks are reached. However in the meanwhile, all efforts to increase the coal stock needs to be made by the generators(Dr. Tata Rao, Bellari, Raichur, Mettur, Mettur II, Notrth Channai, NTECL, Vallur, Ramagundam)

Low DC/Low Generation at NTECL, NTPL, Simhadri –II & Tuticorin TPS needs to be

addressed.

Generation and coal stock at Yeramarus & Kudgi needs to be enhanced/ensured.

All the States could consider availing power from PX as per requirement to ensure that

deviations from schedules are within the specified limit.

All the states are requested to improve the availability by considering the purchases from

SEL, MEPL, CEPL, JSWEL and other stations like LANCO, RGCCPP within SR. RTC

power could be considered to improve the coal stock position / meet the

shortfall/conserve hydro.

As the renewable is more varying due to wind withdrawal (end of season) and solar (due to

cloud cover in monsoon), higher number of machines are required to kept on bars.

The maintenance of units can be condensed.

The block wise deviations are likely to be much higher and it makes sense to utilize the

Overarching Agreement either on MCP or Swap, to take care of RE variability and

display the spirit of regional cooperation.

Better RE & Load Forecast would help in power purchase optimization.

In the 5 months LGB(September 2017 to January 2018) TS has shown deficits in the range

of 8 to 33 MU/day. TS is suggested to plan the purchases accordingly.

Optimal purchases needs to be planned from Power Exchanges to hedge the volatility.

Deviations from schedule need to be maintained within specified limit.

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6.2.4 In the Meeting, MS, SRPC informed that power supply position, coal stock position along-with

measures to overcome the challenge needed to be spelt out. Some partially dispatched and

undespatched generations are available in SR and possibility of utilizing these generations are

also to be explored. Coal stock positions at some of the stations were distressing like at

Raichur and BTPS. Small disruption in coal movements may lead to huge generation loss.

6.2.5 SRPC presented (Annexure-6F) the loss of DC (accounting for forced and planned outages of

the units) with respect to many of ISG Stations during the month of September 2017.There

had substantial fall in DC at Simhadri Stage I (280 MW), Simhadri Stage II (183 MW), Kudgi

(149 MW), Vallur NTECL (229 MW), NLC TS II Expansion (69 MW), NTPL (207 MW) totaling

around more than 1,000 MW. This was a matter of concern and to be analyzed. It was also

observed that Kudankulam generation also was quite low like around 540 MW (for one unit).

Wind generation has come down and Tamil Nadu vide letters dated 06.10.2017 (Annexure-

6G) had expressed concern regarding low generation level at KKNPP and NTECL Vallur. It

was pointed out that KKNPP Unit II is under outage from 4th August 2017, Tamil Nadu being

the major share holder from the unit ie 563 MW, non availability of generation from KKNPP

Unit II jeopardizes the Tamil Nadu Grid. The partial operation of Unit I ie at around 500 MW

from 26th September 2107 had further aggravated the grid condition. TANTRANSCO had

requested that necessary immediate measures may kindly be arranged to maximize the

generation in KKNPP Unit I and also to restore the KKNPP Unit II at the earliest to manage the

present power scenario. It was also requested that the AOH of the unit already planned for

around 75 days from 15th October 2017 onwards may kindly be postponed since the unit is

under prolonged outage. With respect to NTECL Vallur it was noted that Unit III is under

forced outage from 4th June 2017 due to fire at Generator side and the tentative expected date

for unit to be on bar is 15th November 2017. TANTRANSCO requested that necessary

measures my kindly be arranged to restore the NTECL Unit III at the earliest to enable them to

mange the power crisis. It was also requested that generation levels at Unit I & II may be

maximized since at present only around 500 MW from Unit I & II are being maintained.

6.2.6 The latest coal stock position as on 4th October 2017 available at CEA website was projected

(Annexure-6H).

Andhra Pradesh: Krishnapatanam : 0 days, VTPS : 1 day, TPCIL : 21 days, RTPP : 10 days

HNCPL : 9 days

Telangana: Kakathiya : 21 days, KTPS : 14 days

Karnataka: BTPS : 0 days, RTPS : 1 day

Tamil Nadu: Mettur Stage I : 12 days, Mettur stage II : 9 days, NCTPS : 4 days

ISGS : Simhadri : 4 days, NTPL : 12 days , NTECL : 1 day

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6.2.7 SRLDC pointed out that SRLDC had taken up the issue of coal with generators and no reply had

been received and desired to know the actual stock position and action plan to improve the coal

stock position from the generators. MS, SRPC, stated that CEA/MoP may need the action

taken/plan to counter the situation and requested all generators to expedite on the same.

6.2.8 The following was noted:

NTPC Simhadri:

NTPC informed that for the month of October 2017 coal realization is only around 19,400

MT/day ie around 5 rakes. Considering transit loss , generation expected is only around 60-

70 %. Being a rail fed station the DC has to be optimized w.r.t stock. FSA is with ECL and

coal realization from ECL is only around 40%. NTPC has approached Lingaraj mines for coal

and 1-2 rakes/day is being managed through them. NTPC management is in touch with MCL

continuously and 7-8 rakes/day is expected from now onwards. Around 80 % generation

could be expected and hoped that from November onwards full DC was anticipated.

Meanwhile Simhadri is looking for various options to improve the coal stock like diverting coal

from Ramagundam. Earlier Simhadri was paying 30 % premium rate to Singareni and was

managing to get coal but at present Singareni realization also has come down. If imported

coal would have been allowed, coal requirement would have been less and could have been

helped to a great extent. 200 MW DC loss from each stage is expected for October 2017.

It was enquired whether any possibility of diverting coal from other stations of other regions

which are scheduled less because of high cost have been explored. On a query, NTPC

clarified that no coal for Simhadri had been diverted to other stations recently and informed

that it was undertaken only in first quarter when coal stock was comfortable.

NTPC informed that they are facing URS issues and in the first half of the year they have

backed down about 1,500 MU. At present NTPC Ramagudam is backed down by 35 MW.

GM, SRLDC stated that surrender presently was for few blocks, basically due to wide spread

rains in the Region and this was a temporary phenomena. After few days rains may come

down and requirement will be high and URS may reduce.

DGM, NLC informed that even though all the states are surrendering power in many blocks,

except TANTRANSCO no entity was giving concurrence for sale of power in market and NLC

is not able to generate at the DC. Last few days NLC surrender was about 7-8 MU per day.

He requested all the states to cooperate to the extent possible by giving consent for trading of

surrendered power. On a query, he confirmed that NLC was able to trade the surrendered

quantum in last few days.

MS, SRPC opined that there could be variations in the demand and even cheaper generators

may have some URS. TSTRANSCO maintained a Spinning Reserve of around 500 MW, from

the costlier plants such that whenever necessary they can recall the power.

DE, TSTRANSCO informed that at present all Srisailam units are under operation reservoirs

levels are reaching at FRL. Overall hydro generation and storage would become high and

accordingly the spinning reserve may be maintained at their own hydro and NOC for ISG

stations for trading would be considered.

SE(O), SRPC stated that with URS, building of coal stock could be considered. He recalled

that during last month discussion regarding the less scheduling it was noted that coal stock

was for 4-5 days and DC declared was less. NTPC informed that being a rail fed station they

always keep margin for contingencies and there was no machine problems.

Subsequently NTPC vide letter dated 11.10.2017 had submitted the following regarding

less DC from Stage II

One Unit of Simhadri Stage II was under AOH from 24.08.2017 to 22.09.2017. Also

during this period, the coal received was wet and slushy resulting in high specific coal

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consumption and subsequent reduction in coal stock at site. Since firing of wet and

slushy coal leads to frequent chocking of chutes and interrupted power generation, the

stage wise DC was regulated from 55 % to 85 % in order to ensure running of the units

on sustainable basis.

NTPC Ramagundam:

NTPC informed that there was minor loss in DC due to some local elections in Singareni and

poor quality of coal. Rains had also affected the generation which was a temporary problem.

Simhadri also was supported from Ramagundam. It was assured that Ramagundam Units

will be giving full DC for the coming days.

NTPC Kudgi:

NTPC Kudgi informed that they are receiving coal through different routes and one route

was having some issues and it was being resolved. Ash disposal/evacuation issue also

contributed to less generation. At present 4-6 rakes are received per day and coal stock is

comfortable. He assured 85 % DC for Kudgi Unit I in coming days. He informed that Unit II

Trial Operation is planned from 11th October 2017. Kudgi was having bridge linkage (which

is sufficient for full generation) ends on 31st March 2018. Proposal is put up for extension of

linkage.

SE(O), SRPC recalled that in the last SRPC Meeting states had requested for full

availability CGS stations especially during the high demand months of February, March and

April 2018.

MS, SRPC informed that these issues had been taken up with CMD NTPC by SRPC

Chairperson vide letter dated 13.09.2017. In the SRPC Meeting NTPC had committed for

COD of Units II & III and full availability of 2400 MW to the grid from Kudgi during the peak

demand period. NTPC Kudgi assured that full generation will be available for March 2018 &

April 2018.

Subsequently NTPC vide letter dated 11.10.2017(Annexure-6I) had informed that Unit II of

Kudgi had already been synchronized to grid on 18th February 2017 and it is ready for trial

operation which is expected in October 2017 once the coal position is improved. Unit III also

had been synchronized on 23rd August 2017 and NTPC is making all out efforts to put the

Unit on COD during fourth quarter of FY-2017-18.

MS, SRPC expressed that each state desires to know the likely availability of each ISGS

station so that they can plan their purchases and their internal generation schedule.

KPTCL informed that availability from ISG stations are not clear till last moment and huge

difficulties are faced in planning purchases. Getting consent from Management for purchase

of power is a tedious process. Revision of Kudgi availability is affecting their LGB. KPTCL is

having around 1,500 MW shortage and purchase planning was to be optimal.

DE, TSTRANSCO expressed concern on the frequent revision of availability of generation

due to problems in supply of coal , quality of coal, auxiliary power supply issues etc, details

of which are not being made available to system operator in advance for effective planning.

As the day ahead planning is carried out and accordingly purchases are also tied up, any

last minute revisions of availability results in non economic/planned operation. He added

that one of the criteria for accurate day-ahead planning is estimated time of revival of units

under outages which is more significant for bigger size units. It was observed that on

number of instances the assessment time is not accurate, it is frequently changed and the

information is not updated. TSTRANSCO vide letter dated 06.10.2017 had highlighted the

necessity for streamlining the procedure of declaring revision of availability and estimation

of restoration time. If any of the ISG generators are expecting any generation reduction due

to coal issue or any other problems it can be informed to the states in advance so that they

can plan the internal generation/purchases accordingly. He suggested that generators can

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declare the DC three to four days in advance tentatively which will not be used for

commercial purposes. He requested that if possible ISG generators can declare more

during peak hours and less during non peak hours keeping average DC constant since

Power exchange prices are quite high during peak hours.

NTPC expressed difficulty in declaring DC 3-4 days in advance since coal realization was

very dynamic and most of the time coal realization was less than expected.

Deputy CE, KSEBL felt that at present it was a lean period and coal issue was not that

prominent but a definite action plan was required to be firmed up to assure that sufficient

coal stock would be available in the coming peak months.

After deliberations it was decided that for the use of planning purposes, ISG

generators will declare tentative DC (as close as possible for the next three days).

This information will be circulated in closed group. The implementation of the same

will be from 15th October 2017.

NLC TS II :

NLC TS II expansion the DC loss is only 70 MW for the month of September 2017 and it was

not caused by lignite issue. There were some machine issues and rectification would be

taken up during 90 days planned shutdown.

NTPL :

NTPL vide letter dated 26.09.2017(Annexure-6J) had informed that NTPL low generation is

due to the non-availability of coal. Closing stock of coal as on 25.09.2017 was 38,386 MT.

Next ship was expected at VOC Port Tuticorin on 03.10.2017. The available stock of coal

was hardly sufficient to keep only one unit on bar with technical minimum generation till the

next ship was arrived. Lighting up of Unit 2 can be considered only after arrival of further

ship. NTPL had requested that even though the current stock is 38386 MT, station as a

whole may be considered under super critical category for allocation of coal by the

MoC as the Generation (DC) could not be revised in the Unit-I and lighting up of Unit-II is

delayed due to the non-availability of coal to keep the Units in service.

In the Meeting, it was noted that in CEA website as on 4th October 2017 NTPL coal stock is

projected as 12 days. NTPL confirmed that the coal stock as on 09.10.2017 is for 4 days

(1000 MW).

The forum noted that requirement for the day is computed in Tonnes is being calculated

based on the average coal consumption (moving average for the past 10 days). Thus this

does not factor low scheduling by the beneficiaries, unit outages etc. For instance, in a

station with three units, one of the units could be under outage due to any reason or be

under RSD on account of low demand. Thus moving average for the station will show a

lower value on account of unit outage. However, when this unit actually comes back on bars

(due to sudden increase in demand, RE withdrawal, PX prices rising etc), the actual coal

available in number of days would reduce significantly. However, in the daily coal stock

position, the coal stock may be shown relatively comfortable.

Generators suggested that these observations may be considered in computing the coal

stock in number of days, which would help enable them to maintain better coal stock. The

coal stock should be assessed based on the machine capability.

MS, SRPC felt that this issue could have been taken up with CEA by the generators when

this issue was noticed by them. The coal report is coming on CEA website and report is

going to MoP and coal may be released on basis of this report and many review meetings

were carried out by CEA /MoP regarding coal issues.

Subsequently, MS SRPC vide letter dated 17.10.2017(Annexure-6K) had communicated

the concerns expressed by generators in the methodology adopted by CEA in assessing

daily coal stock position.

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NTECL :

Coal stock as on 4th October 2017 is only for one day. The absence of NTECL

representative was noted with concern.

Subsequently the following was submitted by NTECL vide letter dated 16.10.2017

(Annexure-6L).

The coal stock at NTECL was 3.5 LMT in the month of May 2017 and from July to

September 2017 period, coal supply reduced considerably and resulted in low stock

at the end. NTECL had taken up the issue with CIL and its subsidiaries and regular

follow up is being done with coal companies and railways. NTECL had posted one

executive at Talcher area for continuous follow up with MCL, Railways and port to

enhance coal dispatch. NTECL had also signed a side agreement with ECL for 10

LMT additional cola to meet the generation requirement.

Realization from the linked mines of MCL was only 66 % for the period from April to

10th October 2017

Director (O), NTPC had requested Joint Secretary, Thermal, MoP for enhancement

of ACQ of NTECL value from 6.24 MMT to 8.863 MMT equivalent to 85 % PLF.

NTECL requested SRPCs intervention in the following issues to improve stock

position at NTECL:

The specific coal consumption norms specified by CEA needs to be reviewed as

the specific coal defined (0.64 kg/kwhr) is far below the actual specific coal

consumption (0.75-0.80 kg/kwhr). This revision will enable NTECL to get higher

FSA quantity as the FSA quantity by coal companies depends on the specific coal

norms defined by CEA.

NTECL being a rail cum sea route, the coal first comes to either to Dharma port or

Paradip port from where the coal is loaded again in ships to transport to the plant.

The total lead time involved is around 15 days. This means the stock below 15

days should be marked critically by CEA, as coal companies supply cola based on

criticality of coal stock position.

SRPC vide letter dated 17.10.2017(refer Annexure-6K) had taken up the issues with Fuel

Management Division of CEA.

AP :

DE, APTRANSCO informed that they had conducted a Meeting with APGENCO. It had

been agreed that each generator would furnish the coal stock position and generation levels

in three days advance.

LGB can be met through solar bundled power, Hinduja is also being scheduled. At present

Krishnapatanam coal stock is only for ½ day. Imported coal had been stopped in

Krishnapatanam Units. APTRANSCO informed that around 70 % DC is assured from

Hinduja and Vijayawada stations. RTPP had 6 days coal stock at present and will give full

DC.

It was observed that surplus is shown in 5 months LGB. Hinduja is considered for October

2017 only. Krishnapatanam and Vijayawada are considered but according to current coal

stock position the actual availability may be less and needs to be factored in assessing

current/future availability. ISG stations are also considered at full DC which are be less by

around 1,000 MW presently.

APTRANSCO informed that they can meet their Load with gas stations and enhanced

hydro in the coming 6 months. LANCO Stage I started generation (around 63 MW) from first

October 2017. From Spectrum 125 MW generation is expected. Gas allocated to

Vijjeswaram JV is being diverted to LANCO and Spectrum units. HNPCL support will be

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availed, if needed and during peak hours Lower Sileru and Upper Sileru generation can be

increased.

TS :

TSTRANSCO informed that coal stock is comfortable in all the thermal stations. In the

month of October 2017 anticipated consumption is around 194 MU/day. Because of rains in

last few days demand was less (150 MW) and power was sold in market. For future 500

MW power is tied up through STOA purchases (some quantum from MEL). From 10th

October 2017 onwards 300 MW power is being scheduled. For November and December

marginal shortages are anticipated which can be managed through STOA. From January

onwards requirement is arrived considering 24 hours agricultural power supply to all

districts in the state and shortage is more (around 53 MU). SRPC/SRLDC suggested that

TSTRANSCO may plan for LTA/MTOA to meet the additional requirement due to 24 hours

power supply to all districts since it is a consistent/recurring requirement. TSTRANSCO

informed that after getting the clear idea of situations they will go for firm purchases. Also,

around 400 MW power from intra generation is available which can be tapped further. 200

MW intra generation is already being utilized and further utilization could be availed after

getting clarity on requirement and availability.

KSEBL :

Deputy CE, KSEBL informed that LGB is planned with reference to the availability from

ISG stations. 30 % requirement is normally met from their own hydro. 70 % of the

requirement is based on the coal based stations and their availability is also affected with

respect to coal positions of Thermal Stations. At present 70 % of demand is met through

hydro but still demand deficit is there during peak hours and on annual basis energy deficit

also will be there. He felt that the provision to import coal may be permitted to thermal

stations so that the loss of generation due to coal shortage may be tackled. He informed

that Kerala State Government is planning to take up with MoP/ Higher Forum in this

regard.

With respect to LGB for the coming months Dy CE, KSEBL informed that they are

comfortable this year and not anticipating any major shortage. Hydro position is also

comfortable and with 85 % availability of ISGS power KSEBL would be able to mange the

LBG.

KPTCL KPCL:

KPTCL informed that they have planned for a purchase of 1,000 MW RTC power in two

stages. 500 MW is likely to be operationalised from 15th October 2017. Further 500 MW will

be availed considering the anticipated demand pattern. The approval/contract would be

upto June 2018. In case of any additional requirements/contingencies/shortages would be

met from Hydro generation. From 15th October 2017 to 31st December 2017 they are

planning to conserve Hydro. SRLDC KPTCL informed that power of around 1000 MW from

RTPS and 500 MW from Bellari TPS is anticipated. YTPS also had committed for a power

of around 430 MW and so far it has not been scheduled. For the past two months one unit

at BTPS and two units at RTPS are at shut down due to NLD.

KPCL informed that at present YTPS coal stock position is around for 4-5 days. There is no

coal linkage for YTPS. Coal is procured from market. Discussions are going on with MCL

and it was yet to be finalized.

TANTRANSCO:

EE, SLDC, Erode informed that at present sufficient hydro storage of around 1400 MU is

available. Coal stock position is also comfortable. TANTRANSCO is not anticipating any

deficit for the coming months.

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TANTRANSCO informed that they are submitting the coal stock position to Energy Secretary

on daily basis and appropriate action is taken to improve coal stock. At present the coal

stock is comfortable at Thermal generators.

UPCL:

GM, UPCL informed that they will be declaring full DC and coal stock is there for more than

15 days.

TPCIL/SGPL:

Sr. VP, TPCIL informed that they will be declaring full DC in the coming months and coal

stock is comfortable. In December 2017, 15 days outage is planned for one of the units

MEPL:

AGM, MEL informed that as on 09th October 2017 coal stock is for two days. Another

vessel is expected to be reached on 10th October 2017(73,000 MT) which will be sufficient

for 17 days generation.

CEPL:

The non representation from CEPL was noted with concern. SRLDC informed that one unit

is permanently tied up with Tamil Nadu and the other Unit is available for STOA. It was

noted that 150 MW was tied up with Kerala for short period. At present CEPL one unit is

out no requisition.

6.3 RRAS schedule

6.3.1 SRPC had observed that there was regulation up given for the date 17.09.2017 from 03:15 hours

to 06.00 hours (around 2000 MW) and also from 05:30 to 09:30 hours about (around 1200 MW).

The frequency touched 50.32 Hz at 06:04 hours when Regulation up was kicked in. On scrutiny of

RRAS schedule for RGPPL_IR, it was found that down instruction was being implemented from

02:15 hours to 05:45 hours on the same day. However, from the NLDC website, it was seen that

no such instruction appears to have been given to RGPPL_IR. SRPC vide letter dated

20.09.2017(Annexure-6M) had taken up the issue with NLDC and requested to examine the

same.

intent

6.3.2 In the Meeting it was noted that NLDC vide letter dated 03.10.2017(Annexure-6N) had replied to

the same and had noted the following:

RRAS (Regulation Up) was dispatched from 05:30 hours to 09:30 hours on 17.09.2017 as

per prevailing grid conditions. Grid frequency increased to 50.32 Hz at 06:04 hours and

regulation up was withdrawn from 06;30 hours. It was requested that complete sequence

may be seen before coming to any conclusion and mentioned that details are already

available at POSOCO website.

6.3.3 Subsequently SRPC vide letter dated 13.10.2017(Annexure-6O) had again taken up the issue

with NLDC and clarified that the intent of SRPC had been to point out the incident and the action

taken by NLDC from 05:30 hours to 06:30 hours not from 06:30 hours to 09:30 hours. As regards

to the RRAS schedule for RGPPL_IR cited in SRPC letter dated 20.09.2017 the clarification was

awaited from NLDC.

6.4 Hydro generation outage report of unit capacity above 50 MW and is not in running condition due to either planned Outage / Forced Outage

TSGENCO-VS-CE (HPC & HP) had furnished the hydro generation outage report of unit capacity

above 50 MW and is not under running condition due to either planned Outage / Forced Outage

pertaining to TSGENCO (Letter dated 06.09.2017at Annexure-6P)

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6.5 Report on energy losses and other related problems due to Siltation / Sedimentation

6.5.1 TSGENCO-CE (HPC & HP) had furnished the report on “Silt status of Hydro Power Stations” and

include the issue of energy losses and other related problems due to Siltation / Sedimentation

(Letter dated 07.09.2017at Annexure-6Q)

6.5.2 In the Meeting MS, SRPC stated that reduction of storage capacity due to sedimentation is one

issue and loss of generation due to sedimentation is another issue. Since there was no storage at

all for generation, loss of generation due to reduction of storage/sedimentation may not arise. He

requested TSTRANSCO to clarify to CEA whether there was loss of generation due to

sedimentation.

6.5.3 TSTRANSCO informed that there could have been a loss generation due to reduction of storage

capacity due to sedimentation only if sufficient storage capacity was there. He agreed that the

issue will be discussed with TSGENCO and clarification to CEA would be furnished.

6.6 System Studies for the State Grid of TANTRANSCO

Member Planning, CEA vide letter dated 08.09.2017(Annexure-6R) had informed Chairman,

TNEB that BHEL has proposed to conduct system studies for the State Grid of TANTRANSCO for

increasing the transmission efficiency, in view of impact of large scale integration of renewable

power in the Sate of Tamil Nadu. They have also offered to do these studies at their own cost as a

special case. A copy of BHEL letter was also attached. Since these studies would be valuable for

Tamil Nadu for the purpose of efficient utilization of the transmission system, this would be a good

opportunity of getting these studies done, with no cost to Tamil Nadu. CEA had also offered the

services of CEA engineers to be associated with the study.

6.7 CERC Order on Petition No. 84/MP/2015 with regard to inadequate/non performance of FGMO

6.7.1 A Petition (No 84/MP/2015) was filed by National Load Despatch Centre (NLDC) with CERC to

direct all utilities to provide Primary Response as provided for in the IEGC in Sections (f), (g), (h)

and (i) in the interest of power system security. In this regard, Hon'ble Commission vide its order

dated 31.07.2017 (available at htpps//posoco.in / spinning-reserves) has directed all ISGS to

provide primary response by all generators in accordance with IEGC which would help in further

improving the frequency profile.

6.7.2 In the 135th OCC Meeting, SRLDC had made a presentation on highlights of the CERC Order on

Petition No. 84/MP/2015 and on approved methodology of FRC Calculation. After deliberations,

it had been decided that the calculation of Power Number may be analyzed in depth and

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may be presented in next OCC since the Power Number have direct impact on frequency

correction which is reflected in unrestricted requirement. All SLDCs were requested to

present the FRC calculation in respect of their control area in the next OCC Meeting. All the

States needed to do the exercise for each generators and DISCOM wise.

6.7.3 In the Meeting GM, SRLDC clarified the following :

Time duration for FRC calculation: 60 Seconds

Data updating time in SCADA : 5 to 10 seconds

6.7.4 AII the states were requested to present the FRC computations. APTRANSCO informed that they

need some clarification regarding the calculation of Power Number and FRC and requested

SRLDC to guide them. KSEBL informed that there was some data availability issue from hydro

stations and issue is being taken up. KPTCL informed that because of non availability of data in

specific format they couldn’t do the calculation

6.7.5 SRLDC/SRPC stated that in the 135th OCC Meeting the issue was well deliberated and calculation

part also was explained and as per Regulations calculations should be carried out. If any specific

doubts are there, those can be clarified from SRLDC.

6.7.6 TSTRANSCO stated that the points (A, B & C) to be adopted for Power Number calculation and

FRC calculation need to be clarified. SRLDC clarified that for Power Number computation only

direct response may be considered excluding the primary response of generator. For computation

of FRC both load and primary response will be considered. SRLDC suggested that the calculation

may be carried out using one minute data instead of three minute data. FRC calculation is to be

carried out in line with approved methodology by CERC.

6.7.7 MS SRPC suggested that a workshop through VC for understanding and discussion of FRC

calculation with states may be convened on 30.10.2017. States should participate with

preparation. States are requested to submit the FRC computation before 25th October 2017. If any

incident of RGMO response is there upto 20th October 2017 that incident would be considered for

FRC calculation or otherwise last incident (18th August 2017) which was earlier posted would be

used. Doubts if any, may be clarified with SRLDC.

6.7.8 Subsequently SRLDC vide E-mail dated 26.10.2017 had informed that due to unavoidable

reasons the workshop is rescheduled to 06th November 2017 at 15:00 hours. All SLDCs were

requested to attend the workshop through VC and present the FRC calculation of their control

areas.

6.8 Consideration of Talcher Stage II as Upstream or Downstream based on different congested corridors

6.8.1 In the Commercial Sub Committee Meeting held on 8th August 2017, SRLDC had raised the

following issue:

Talcher-II station of NTPC physically located in ER to be considered as not part of SR

constituents for purpose of declaring as “upstream or downstream” during congestion. It

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was opined by SRLDC representative that the electrical behavior of Talcher-II may be

inverse to the desired response from SR constituents.

6.8.2 In this regard SRPC vide letter dated 23.08.2017 had brought some of the issues to kind attention

of NLDC. It was suggested that in future while issuing warning notices, Talcher Stage II should be

specifically informed about the desired action. This is in view of the fact that post facto

correction/changes in upstream or downstream are not possible after real time warning notices are

issued.

6.8.3 In the Meeting it was noted that NLDC vide letter dated 03.10.2017 Annexure-6S) had replied to

SRPC letter and in which it is mentioned that the matter has been noted and required instructions

have been given to NLDC control room. SRLDC clarified that the suggestions/views of SRPC

were well acknowledged and accordingly NLDC had given instructions to NLDC control room. In

each instance whether Talcher Stage II is considered as upstream/downstream will be intimated

specifically.

6.9 Operation of Hydro Power Projects In Peaking Mode

6.9.1 Forum of Load Despatchers (FOLD) and POSOCO have prepared a report “Report on

Operational Analysis for Optimization of Hydro Resources & facilitating Renewable

Integration in India”. MoP had constituted a sub-committee under Chairperson, CEA to study

and recommend the individual hydro power stations which can be operated to achieve peak load

capacity. It was desired by CEA that monthly analysis of performance of Hydro Stations in OCC

Meeting needed to be done, SRLDC may kindly project the performance in every month OCC.

6.9.2 In the Meeting, SRLDC presented the performance of the Hydro Stations (Annexure-6T). Last

month generation data had been taken for the analysis. Day maximum generation in % with

respect to Installed Capacity is computed. Srisailam has achieved 86 % of installed capacity

maximum though out the month. Three fields are made showing greater than 80%, 90 % and upto

100 %. Upper Sileru and Lower Sileru had also performed well. Nagarjunasagar percentage was

very low (12%). TSTRANSCO informed that generation instructions had not been given to

Nagarjunasagar yet. At present only Srisailam units are running and in coming days according to

irrigation requirements Nagarjunasagar units will be brought to operation.

6.9.3 It was felt by the forum that since the analysis is based on the day peak; it is not giving a picture

whether the hydro peaking was at peak hours. It did not factor the unit availability, head, daily

generation quota etc.

6.9.4 KSEBL informed that Lower Periyar units cannot be run at its maximum capacity once the rains

are stopped as they are ROR (operation depends upon upstream discharge). Also the comparison

is based on the entire installed capacity and units under maintenance are not considered.

6.9.5 TANTRANSCO submitted that their scheduling philosophy is specific for each hydro stations and

in stations like Kundah machines are operated in combinations.

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6.9.6 SRLDC clarified that the report is a preliminary step of analysis and the analysis is not considered

the following:

Reservoir level

Generator Outages/machine availability

Scheduling Philosophy of the states.

6.9.7 KPCL informed that they have received a MoP query/DO letter regarding the non

operation/scheduling of Sharavathi units.

6.9.8 KPTCL stated that it is SLDCs discretion to decide whether to schedule or not according to their

scheduling philosophy.

6.9.9 After deliberations, it was noted that report was preliminary and no conclusions could be drawn

from it.

6.10 Utilization of RE Generators for Reactive Compensation & High Voltage

6.10.1 In the 135th OCC Meeting, it was noted that even though Solar Generators/Wind Generators have

very controllable reactive injection/absorption possibility they are not being utilized because of

PPA commitments/penalties. It was suggested that SLDCs/STU may approach their Regulator for

a flexible set point as per the directions of SLDCs. The directions of SLDCs could be based on

voltage levels on seasonal basis or on solar/non solar hours on daily basis. After deliberations it

was felt by the forum that SRLDC may address to all SLDCs requesting them to approach the

management to incorporate the modification in the PPAs such that RE generators also can be

utilized for Reactive Power compensation and controlling the voltages. SLDCs should have the

mandate to advise generators to participate in the reactive compensation as and when required.

6.10.2 In the Meeting, APTRANSCO informed that PPA conditions/billing needed to be examined.

6.10.3 As per the inputs there was penalty for drawal of MVAR. It was noted CEA Regulation mandates

that the power factor to be maintained in the range to 0.95 lagging to 0.95 leading.

6.10.4 TANTRANSCO informed that they had a discussion with IWPA and they had assured reactive

support from grid synchronized wind generators in both the ways(absorption/injection). North side

of Tamil Nadu is normally high voltage area. SRPC/SRLDC stated that the instructions to absorb

or inject the MVAR should be on area wise according to grid requirements.

6.10.5 After deliberations it was decided that this issue would be put as an agenda item in the scheduled

RE/LVRT Meeting.

6.11 Powergrid elements which were observed to be in an advanced stage construction/ Commissioning with schedule as per Investment Approval, subsequent to the proposed commissioning /COD

6.11.1 In the 32nd Meeting of SRPC held on 22.08.2017 Power Grid had submitted status of various

upcoming elements in the Region in which some of the elements were observed to be in an

advanced stage of construction/ commissioning with schedule as per Investment Approval,

subsequent to the proposed commissioning /COD. As decided in the Meeting, a Special Meeting

was conducted on 1st September 2017 in SRPC, Bengaluru with participation of CTU, States,

SRLDC and SRPC. The Report had been submitted to Chairperson SRPC vide SRPC letter dated

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04.09.201. TSTRANSCO vide letter dated 14.09.2017 had informed that Chairperson, SRPC and

CMD/TSTRANSCO had approved the Report and requested SRPC to take further necessary

action.

6.11.2 Accordingly SRPC vide letter dated 26.09.2017(Annexure-6U) had forwarded the Report to

Powergrid/CTU/States.

6.11.3 In the Meeting, OCC noted the above.

6.12 Terms and Reference for the proposed study on Renewable Integration

The issue was further deliberated in 31st TCC/32nd SRC meetings and it was agreed that a

separate meeting would be held at SRPC with participation from constituents/RE

Developers. TANTRANSCO would coordinate for RE Developers participation.

6.13 Compliance of CEA Regulations for Grid connectivity of Renewable Energy Sources

6.13.1 CEA vide letter dated 12.04.2017 & 08.05.2017 (enclosing MoP letter 06.04.2017) and Special

Meeting on 28.06.2017 & 11.09.2017 had observed that it was obligatory for all the grid connected

renewable generators to provide necessary facilities for data-communication and data-storage and

other parameters as may be stipulated. It was decided by CEA that the respective states will

submit weekly reports of data communication status to CEA as well as to respective RPC/RLDC

and NLDC.

6.13.2 In the Meeting it was noted that weekly reports are received from all the states except from

Karnataka and Tamil Nadu. SRPC/SRLDC felt that to have focused discussion on the issues a

special meeting may be convened on 25th October 2017 at SRPC. KSEBL suggested that RE

Developers like CIAL & BPCL may also be called to the meeting.

6.13.3 The 4th Meeting on LVRT for compliance of Orders of Hon’ble CERC in respect of Petition No.

420/MP/2014 & provisions of CEA/CERC Regulations and other RE issues was held on

25.10.2017 at SRPC, Bengaluru. Officials from SLDCs of TN, AP, TS, Kerala, TANGEDCO,

IWPA, SRLDC & SRPC participated in this Meeting. The Minutes of the Meeting is available at the

SRPC website.

The following was the updated status on RE SCADA availability as noted in the Meeting:

State SCADA availability as on 25th Oct-17

Mapped/IC

SCADA availability as informed in CEA’s meeting held on 28th June

2017 Mapped/IC

AP Wind: 3620/3770 MW Solar: 1901/2060 MW

Wind: 95.5% Solar: 96%

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TS Wind: 100.8/100.8 MW Solar: 132 kV level and above 1486.4/1486.4 MW 33 kV level and below 553.5/918.6 MW

All 23 RE generators connected at & above 132 kV : 1044/1044 MW RE generators connected at 33 kV below : 323.24 (41 RE generators) / 756 MW (63 RE generators)

KA Wind: 3504.5/3504.5 MW Solar: 1476/1476 MW

Wind: 3595.23/3595.23 MW Solar: 1086.4/1086.4 MW

KE Wind: 16/59.3 MW Solar: 57/75.1 MW

Wind: 22/65.475 MW Solar: 36/71 MW Hydro: 87.5/194 MW

TN Wind: 4100/7858 MW Solar: 648/1850 MW

Wind: 2105 (92 WEGs) MW

The following were noted in the RE/LVRT Meeting:

SRPC pointed out that 100 % RE visibility was required to be ensured and the issue was

being viewed by MoP / CEA. Weekly status reports were to be furnished to CEA.

TANTRANSCO informed that SS under 10(1) have been issued notices for SCADA

availability. Within 15 days, 100% SCADA availability of Wind was expected. SRLDC stated

that RE details could be extended to SRLDC by 30.11.2017. For Solar SCADA availability,

both TANTRANSCO (Communication part) and TANGEDCO (Metering part) had jointly

initiated the action and it was targeted to be completed by March 2018.

APTRANSCO informed that pending SCADA availability was for RE connected at Distribution

level for which, action had already been taken for compliance.

TSTRANSCO informed that 100 % RE SCADA availability had been ensured at 132 kV and

above. Action for balance pending at 33 kV and below was being followed up and notices had

been issued.

SRPC / SRLDC requested the SLDCs that pending SCADA availability of RE sincerely with

concerted efforts for compliance of CEA / CERC Regulations.

SRLDC pointed out that availability of redundant / reliable path, internet etc could also be

considered by the SLDCs.

6.14 Shifting of PMU from GMR-Vemagiri to NP Kunta-Status

All the States were requested to give the requirements for Second Phase to CTU.

PMU had reached NP Kunta on 19th September 2017 and commissioning activities were

being taken up.

6.15 State-wise allocation of 540 MW power from RGPPL to Railways

6.15.1 540 MW power from Ratnagiri Gas and Power Private Limited (RGPPL) has been allocated to

Indian Railways. Allocation to SR States (out of 540 MW) would be as under:

State Nodal Railway Maximum load in MW after availability of corridor between NEW Grid and SR*

Telangana SCR 50*

Tamil Nadu SR 100*

Karnataka SR 35

date of effectiveness subject to availability of transmission corridor as per assessment of

CTU.

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6.15.2 CTU vide letters dated 20.04.2017 & 08.06.2017 had informed that the power transfer can be

effective upon commissioning of upcoming Nizamabad-Maheswaram 765 kV D/C line, which is

likely to be commissioned by October 2017 . This issue was further deliberated in the 32nd SRPC

Meeting held on 22nd August 2017 in which CTU had informed that the Transmission Corridor for

the above allocations was likely to be available from 1st October 2017.

6.15.3 SRPC vide letter dated 27.08.2017 had taken up the issue with the concerned States and had

requested that the matter be taken up with Indian Railways urgently, so that all pending issues

such as metering etc. are resolved well before 1st October 2017.

6.15.4 In the 135th OCC meeting the following was noted.

Secretary, Power had taken a Meeting on 06.09.2017

TSTRANSCO had informed that one more internal Meeting had been convened on

31.08.2017 with Railways. TSTRANSCO had forwarded the Minutes of the Meeting.

TANTRANSCO had informed that TANGEDCO is convening an internal meeting with

Railways on 12.09.2017. The outcome will be shared.

KPTCL had informed that the railway issue is under discussion. At present Railways have

PPA with BESCOM. Railways have asked BESCOM to disconnect the supply as they

would be accessing the power through Open Access. BESCOM was not agreeing with

Railways and they are planning to go for an appeal. Matter had already been referred to

Legal Section and opinion from them was awaited.

6.15.5 SRPC vide letter dated 28.09.2017(Annexure-6V) had further taken up the issue of 35 MW

allocation to Karnataka with KPTCL and requested to have suitable mechanism in place to

implement the allocation. MoP letter dated 07.06.2017 in this regard was also enclosed.

6.15.6 TANTRANSCO vide letter dated 28.09.2017(Annexure-6W) informed that in principle NOC for

availing open access power of 100 MW from M/s RGPPL for Railway Traction in the State of Tamil

Nadu is issued subject to the following conditions:

For availing 100 MW of power from M/s RGPPL by Southern Railway, the energy

accounting procedure has to be framed by SLDC which requires the following

a. All the drawal points of Southern Railway Traction Sub-Stations (TSS) has to be

integrated with SLDC’s SCADA for online monitoring of power drawal by providing

RTU at TSS end at the expenditure of Southern Railway.

b. All the drawal points of Southern Railway TSS has to be provided with energy meter

having ABT, DLMS and AMR complied with class of accuracy as per CEA guidelines

at the expenditure of Southern Railway.

c. The Southern Railway has to furnish daily day-ahead block wise drawal schedule for

all their drawal points of TSS.

d. The Energy Accounting and Scheduling should be as per the CERC Regulations.

However the deviation settlement mechanism is in the purview of state and the Intra-

state ABT mechanism is yet to be notified.

The energy drawn from the TANGEDCO due to non-availability of OA power will be billed

under HT Tariff (I-B Railway traction) till Intra-State ABT Regulation is notified.

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The Southern Railway has to pay all other applicable charges such as open access

charges, transmission charges, wheeling charges, Scheduling and System operation

charges etc.

The Charges including Cross subsidy surcharges and additional surcharges shall be levied

subject to the final decision in Appeal No.276/2015 pending before the APTEL and such

second appeal if any filed before the Supreme Court in future.

In case of failure of alternate supply and if Railways continue to draw power from the grid,

TANGEDCO has to keep 100 MW of power available and hence fixed charges as

applicable are liable to be paid by the Southern Railway.

The Southern Railway has to execute an agreement with TANGEDCO on 03.10.2017

agreeing to the above conditions without fail.

6.15.7 South Western Railway vide letter dated 27.09.2017(Annexure-6X) had informed BESCOM that

Railway load drawal points shall be treated as disconnected w.e.f 1st October 2017 as consumer.

It was requested to depute authorized representative at 00:00 hours of 01.10.2017 for taking the

joint meter reading at the three locations ie Whitefield traction substation, Someswara traction

substation and Rail Wheel factory. Railway will start taking power as deemed licensee from 00:00

hours of 01.10.2017 from RGPL plant at the Dabhol as per the allocation of Power.

6.15.8 In the Meeting, SRLDC informed that LTA of 35 MW to SW Railways (Kar) had been kept on hold

by CTU because of pending commissioning of 400kV Nizamabad-Shankarapalli D/C line

6.15.9 KPTCL informed that BESCOM had written a letter on 28.09.2017(Annexure-6Y) and had

submitted that Railway request for disconnection as mentioned in Railway letter cannot be

considered as DDL from BESCOM end and also 3 Nos. EHT Railway installations will continue to

be treated as BESCOM consumers.

6.15.10 GM, SRLDC noted that KPTCL had given 25 years NOC to Railways as a deemed Distribution

Licensee. As there is a firm MoP allocation and NOC is available, SRLDC would have to start

scheduling the power as soon as CTU operationalises the LTA.

6.15.11 KPTCL informed that SLDC can schedule the power treating as an OA consumer. BESCOM and

Railway needed to be arrive at a consensus. The metering equipments are owned by BESCOM.

Management views had already been recorded in the 32nd SRPC meeting.

6.15.12 GM, SRLDC stated that no other state other than KPTCL & TANTRANSCO had given NOC (copy

of NOC at Annexure-6Z). He requested KPTCL to expedite and finalize the required internal

arrangements/modalities between BESCOM and Railways to see that the power can be

scheduled. He added that the entire scheduling program is being made ready.

6.16 Confirmation for the indicated plan for FGD/Phasing Out Plan for implementation of new Environmental Norms for Thermal Plants issued by MOEF & CC

6.16.1 In regard to compliance of new Environmental Norms for Thermal Plants, issued by MOEF&CC,

FGD phasing plan and Phasing Out Plan are under diiscusion.

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6.16.2 Funding from PSDF was further discussed in the 32nd SRPC Meeting held on 22nd August 2017.

Accordingly Chairperson, SRPC vide letter dated 28.08.2017(Annexure-6AA) had taken up the

issue with MoP.

6.16.3 CEA vide letter dated 01.09.2017 (Annexure-6AB) had communicated regarding convening of

Special Meeting to revise the Phasing Plan for identified units for ESP up gradation and FGD

installation. Subsequently Meeting was conducted on 18.09.2017 at SRPC Bangalore with

participation from CEA and all the concerned power utilities of Southern Region. The minutes of

the Meeting are available at SRPC website.

6.16.4 During discussions in the Meeting, stake holders expressed certain issues as follows which had

been communicated to Chairperson, CERC vide letter dated 04.10.2017.

It was noted that Hon’ble Commission had pronounced its Orders on 20.03.2017 in respect

of Petition No 72/MP/2016. This petition was seeking ‘in principle’ approval of abstract

schemes of capital expenditure in compliance of Environmental (Protection) Amendment

Rues, 2015.

It had been ordered by Hon’ble Commission that 2014 Tariff Regulations do not provide for

grant of “in principle approval” for capital expenditure. Thus, the prayer of the Petitioner for

“in principle approval” by relaxing provisions of the Tariff Regulations is not maintainable.

In the Meeting held on 18.09.2017, stake holders expressed that the implementation of

new environmental norms was highly capital intensive (about Rs 100 lakhs/MW).

In view of uncertainty in regulatory aspects, generators would be facing challenges,

especially in arranging the funds etc.

SERC and CERC could consider suo-moto approval of the new environmental norms and

the associated costs for installation of FGD and other system systems ‘Change in Law’ for

both Section 62 and Section 63 PPAs enabling Generators to implement the required

schemes without fail.

Compensation under Change in Law provisions of PPAs can be approved after due

prudence check of completed cost by the respective Commissions on a case to case

basis.

This issue being of national importance, FOLD may like to kindly deliberate on these

aspects and take a view on the matter.

Since phasing plan is to be implemented in a highly time bound manner, there may need to

be some procedural acceleration, say by way of bypassing of consent of beneficiaries etc.

In view of the time bound nature and its critically, it had been requested that the concerns

expressed by the generators may kindly be arranged to be examined.

6.17 Scheduling of Simhadri Stage I Station

In the Meeting SRLDC informed that Main/Check meters at Simhadri Stage - I end of Inter

connector had been installed on 27.09.2017.

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6.18 Monitoring of scheme funded from PSDF

In the meeting, it was noted that NPC Meeting was conducted on 08.09.2017. The minutes of the

Meeting was awaited.

6.19 Right of Way issue of 400 kV Nelamangala-Hoody Line/ commissioning of 400 kV Yelahanka substation/220 kV evacuation system of KPTCL at Yelahanka substation

SR II, PGCIL had informed that the issue is being followed up with State Administration for

removal of ROW issues for LILO of Nelamangala - Hoody at Yelahanka. KPTCL had informed that

cable had been received and it was scheduled to be commissioned in December 2017. ROW

issues are being resolved.

6.20 Daily Load Forecasting by SLDCs/RLDCS/NLDC

6.20.1 The mean absolute error (forecast Vs actual demand) for the month of September 2017 as

furnished by SRLDC is at Annexure-6AC.

SRLDC computed Mean Absolute % Error based on States data

Description AP TS KAR KER TN

Average 4 5 8 5 5

Max 7 16 18 14 13

Min 3 2 0 2 2

6.20.2 In the Meeting, it was noted that at the end of the month the forecast error was observed to be

high. All the states informed that the huge error is due to unexpected rains. SRLDC informed that

for all the states they had used the data furnished by respective states for analysis.

6.20.3 KPTCL informed that on demand had reduced by 3,800 MW and on energy basis the consumption

was reduced from 170 MU to 113 MU.

6.20.4 KSEBL informed that they have approached many forecasting agencies but accuracy level of

KSEBL was far better. KSEBL has analyzed the incidents where forecast error had gone above 10

% and found that after fall in demand, restoration took more time which caused more error.

6.20.5 GM, SRLDC requested states to incorporate weather inputs in the methodology so that the error is

minimized and suggested to approach well recognized forecast agencies.

6.20.6 It was urged that forecast error should be within the limits as per the industry practice.

6.20.7 In the 126th OCC Meeting, SRLDC had informed that a Pilot Project for RE forecasting had been

started. Pilot Project for load forecasting was yet to commence. RE Connect has been entrusted

the work.

6.21 Scheduling of NTPC Ramagundam Solar Power Plant(10 MW)

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In earlier Meeting, NTPC had informed that written communication to MoP would be shared with

SRLDC/SRPC. The same was shared.

6.22 Upcoming Wind/Solar Projects

6.22.1 In the earlier OCC Meetings the following was noted:

It was noted that procedure for RE Frameworks had been notified and is available at

NLDC website. It was requested to all the concerned to take up with generators and

whatever information as mentioned in the Notified Procedure are to be collected/ensured

from RE generators.

SRPC had informed that the progress of works of RE Generators and evacuation system

are available in TCC/SRPC Minutes. All the concerned were requested to update the

same and revert back at the earliest incorporating appropriate changes.

6.22.2 In the Meeting SE(O), requested all the concerned to furnish the updated information and

emphasized that in the expected high addition of RE generators in the coming future.

6.23 Status Review of REMC project implementation.

6.23.1 In the 134th OCC Meeting SRLDC had informed that the proposal has been put up to Empowered

Committee. Approval had been delayed due to administrative issues and approval is expected by

this month end. Execution period is 15 months from approval date. There are four schemes for

three states namely for Andhra Pradesh, Karnataka and Tamil Nadu and one for SRLDC.

6.23.2 SRLDC informed that official memorandum from Ministry of Power (GOI) containing sanction had

been received in Sep 2017.

6.24 Power Flow Analysis under high RE scenario

6.24.1 A project has been undertaken jointly by POSOCO, USAID and NREL for power flow analysis

under high RE scenario. In the Meeting, SRLDC informed that APTRANSCO needed to furnish

the data and requested them to furnish the details at the earliest.

6.25 PSS Tuning of generators

6.25.1 5th Meeting to review the status of PSS tuning of the generators was convened on 26th July 2017

and minutes of the Meeting are available at SRPC website. All the generators to follow the action

plan finalized in the 5th PSS meeting.

For the following Units, PSS is to be tuned and SRT to be carried out / information not available :

Entity Generating Stations/Units

APGENCO VTPS U5 & U6; Lower Sileru HEP U2 to U4

AP IPPs

TSGENCO Kothagudem TPS U7 & U8

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KPCL Yeramarus TPP; Sharavathy HEP U8

KAR IPPs JSWEL U4

KSEBL Idukki HEP U1 to U6

TANGEDCO NCTPS St-II U2; Tuticorin TPS U1; Kadamparai HEP U3 & U4

TN IPPs STCMS

CGS NTPC-Ramagundam U1 to U6; NTPC-Kudgi U2; NLC-Neyveli TPS I Exp. U1 & U2 (SRT report not submitted); NPCIL- KGS U1 to U4; NPCIL-MAPS U1 & U2; NPCIL-KKNPP U2

ISTS connected IPPs

TPCIL U2; Coastal Energen U1; Lanco Stage II & III; SGPL-Nellore

6.26 Implementation of URTDSM (PMU) project in Southern Region

6.26.1 In the Meeting it was noted that the issues related to URTDSM would be discussed in the

scheduled Meeting on 25.10.2017.

6.27 Status of Voice communication between regional entities and SRLDC 6.27.1 In the Meeting SRLDC has pointed out the following:

Non-availability rate is greater than 80%

CGS and critical Powergrid 765/400 kV S/s are regularly not available. Many handsets are

placed in unmanned location.

SRLDC items like handsets, Head phones etc., till not received as per approved BOQ.

6.28 Video Conferencing facility at SLDCs

AP PUDU

APSLDC informed that VC facility was commissioned on 7th October 2017.

Puducherry would take up VC requirement in the next financial year 2017-18.

6.29 Status of important elements

ICT at Madurai

It was noted that the provision of one No. of 500 MVA additional ICT at Checkanoorani 400/230

kV S/s in PGCIL end 400 kV side was commissioned on 29.12.2016. TANTRANSCO had

informed that LV side 230 kV bay work is under progress and would be completed on

31.10.2017(tender was opened on 16.05.2017).

Completion of Kamudhi bay at Karaikudi – PGCIL and TN SLDC to update

In the Meeting, PGCIL had informed that the works will be commissioned by

15.11.2017(Schedule as per LOA is by April 2018, 95 % supply and 60 % erection is

completed).

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6.29.1 Advance intimation regarding first time synchronization of transmission elements with all

necessary

In the earlier Meetings the following were noted:

The approved procedure needs to be followed.

SRLDC had informed that even after continuous communications made /awareness

workshops conducted, the issue of advance intimation of first time synchronization of

transmission elements with all the necessary documents are not received in some of the

cases.

In the 135th OCC Meeting, SRPC had requested SRLDC to come up with specific cases

so that such cases may be taken up at appropriate level.

6.29.2 In the Meeting, GM SRLDC informed that the issue still persists and difficulties are faced in

receiving data availability and intimation for integration being received few days earlier in some

cases.

6.29.3 MS, SRPC felt that the issue is persisting since long and it needed to be addressed.

6.29.4 SRLDC submitted the list of elements (from May 2017) (Annexure-6AD) for which A1 to A6

formats were not submitted 10 days in advance.

6.30 Letter from MNRE

In the 134th OCC Meeting SRLDC informed that SRLDC has received a letter from MNRE on

Ministry of Defense request to MNRE to formulate a methodology to switch ON or OFF the wind

farms/turbines near to IAF/Railways during war time using centralized system in order to avoid

any interference to IAF operations in the war. SRLDC had informed that they would

communicate to states to furnish the information as sought by MNRE. They would seek clarity

on ‘vicinity’ from MNRE.

In the Meeting, it was noted that clarification on Vicinity has been sought from MNRE through

NLDC considering the issue was common to all the Regions. Reply from MNRE is awaited.

6.31 Load Change Over mitigation during Morning and Evening Peak hours

6.31.1 In the Meeting SRLDC presented the load change over during the period from 12th to 18th

September 2017 (Annexure-6AE). AP and Karnataka were showing large changeovers. In

respect of AP/KAR the variation was around 1,000 MW at 18:00 hours. KSEBL was contributing

around 200 MW at 18:00 hours.

6.31.2 APTRANSCO informed that staggering of loads under APEPDCL/APSPDCL were over and

they had analysed the data from 20th to 30th September 2017 and the variation observed was

around 400 MW only. SRLDC agreed that they will analyze the data for the same days and

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revert back. GM, SRLDC requested that the analysis done by States may kindly be forwarded

to SRLDC before 5th of every month to avoid such mismatch in future.

6.31.3 In case of Karnataka it is observed that at 1800 hours there is a sudden increase in demand.

KPTCL informed that they will stagger the load changeover and would take care of the sudden

increase in demand.

6.31.4 MS SRPC pointed out that internal generation should be increased according to steep increase

in demand in the state control areas and ISTS drawals should be maintained within limits to

ensure IR flow/critical line flows are not affected.

6.31.5 SRLDC agreed that in the next Meeting SRLDC will come up with multiple minute wise data

analysis (drawal pattern of states/IR flows etc. also will be plotted).

6.32 Huge negative Deviation by Tamil Nadu on 27.09.17

6.32.1 SRLDC vide letter dated 28.09.2017 (Annexure-6AF) informed that on 27.09.17 TN was under

drawing continuously at regular intervals since morning, to the maximum negative deviation of -

700 MW at 11:00 hours (TN Chart also was enclosed). Such huge deviations are in turn

reflecting in the Inter regional deviation and skew in the line flows of various transmission corridors

& high frequency in the grid. It was requested that TN may forecast their load and RE and adopt

optimum scheduling, and Load Despatch Control Room Officials may also be sensitized to

mitigate the deviations. Further it was also requested to explore the possibility of implementing

Overarching agreement for selling the surplus power of Tamil Nadu on real-time basis.

6.32.2 MS SRPC stated that since TANTRANSCO was under drawing in a sustained way, it could have

resorted to selling the power to trader/PX/. Maintaining the grid parameters within the limits as per

Regulations to ensure safe grid operation was of paramount importance.

6.32.3 EE, SLDC Madurai informed that during June to September they could manage the wind

generation in a proper manner. From 20th September 2017 onwards the wind started changing

the direction but maximum potential is available if wind direction is from West to South. There is

no proper prediction of wind direction. During the S-W monsoon when wind season recedes the

change of direction takes place in sudden manner even on the same day. On 27th September

2017, actual wind direction was from S-W though forecast was from W-S. This phenomenon

occurs during the start and end of the wind season for 15 days. He assured that except during

these periods TATRANSCO is able maintain the deviations within the limits. He assured that the

issue of selling the power will be apprised to Higher Management.

6.33 Request for Review of SPS

6.33.1 Review of Raichur - Sholapur link associated SPSs was carried out in February 2016 and

subsequently, the revised logics were implemented and some of the SPSs were disconnected.

Since then, number of parallel circuits like Wardha-Nizamabad and Angul-Srikakulam have

come up between NEW and SR grid. It has been observed that the flow of Raichur-Sholapur has

reduced and the sensitivity of upstream elements like Wardha-Parli, Parli-Sholapur and

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Aurangabad-Sholapur wrt SR loads would have come down. Any non-operation of SPS and

partial reliefs are viewed seriously. There have been few instances of mal-operation of the SPS.

Keeping in view the above SRPC vide letter dated 06.10.2017 (Annexure-6AG) suggested to

NLDC that the SPS schemes could be reviewed for modification/disconnection etc. It was also

suggested that the modification/disconnection could be further deliberated through VC.

6.33.2 In the Meeting, SE(O), SRPC informed that it was perceived in all the forums that more number

of SPS bring down the security level. There had been instances of spurious trippings and on

some occasions desired relief was not realized.

6.33.3 States agreed and suggested for review of SPS schemes. SRLDC was requested to kindly co-

ordinate with NLDC.

6.34 Supply of Spare RTU Cards

6.34.1 KKNPP vide letter dated 13.09.2017(Annexure-6AH) informed that the RTU panel was

supplied, installed and commissioned by M/s PGCIL and this panel consist of components such

as analog, digital and CPU cards of GE make. Presently KKNPP analog data was not updating

at SRLDC which was communicated through email dated 12.9.2017. RTU panel Analog card

was checked and found two out of three Analog cards are defective. KKNPP requested SRLDC

to make arrangements to provide two analog cards on urgent basis for replacing the defective

cards. KKNPP was planning to purchase the spare cards from M/s PGCIL and requested

PGCIL to inform KKNPP regarding the willingness for supply of spare cards for RTU panel.

6.34.2 In the Meeting, it was urged that spare cards needed to be maintained so that during emergencies

the same can be used and downtime could be minimized.

6.34.3 SR II informed that they have received the letter from KKNPP and it had been put up to

Management. Powergrid suggested that KKNPP may approach M/s GE directly since tendering

process will take time.

6.35 Non Availability of Kaiga, Trichy & Hyderabad Voltage(SCADA) data at SRLDC

6.35.1 In the meeting SRLDC informed that this issue is prevailing since long and to be attended

immediately.

6.35.2 SR-I informed that Hyderabad 400 kV voltage is made through and problem is with 220 kV side

which is under TSTRANSCO.

6.35.3 TANTRANSCO, Kaiga GS and TSTRANSCO were requested to attend the problem at the

earliest.

6.36 KKNPP Opening of ICT In the meeting GM, SRLDC informed that KKNPP is keeping one ICT permanently out on 220 kV

side (out of two ICTs). On enquiry KKNPP had mentioned that it was a general practice. It was

emphasized that no element should be taken out without the consent of SRLDC and requested

KKNPP to take the element into service.

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6.37 NOC for trading: NLC request

6.37.1 NLC requested AP and Karnataka to furnish NOC for trading URS power. The power exchange

price was going upto Rs 4-5 even at night hours and it would be a good financial benefit for them,

if even for a few blocks they could sell the power in the market.

6.37.2 KPTCL informed that they had entered into the contracts of power purchase of 1,000 MW to meet

the demand from October 2017 and in the expected increasing demand growth there may not be

any URS from KPTCL.

6.38 Nodal Officer list : Disaster Management

SRLDC requested all the concerned to update the Nodal Officer list at the earliest. The updated

status as per the information available with SRLDC has already been shared and requested all to

inform changes, if any.

7 GRID FREQUENCY

7.1 High frequency

7.1.1 High Frequency Grid Operation

7.1.1.1 It was noted that the Regional Grid had operated above IEGC range i.e.50.05 Hz for 14.75 %

of the time. It was also noted that the frequency on some of the days was higher for

considerable periods as shown below:

Date

Percentage of time of Frequency

50.05 Hz &<50.2 Hz

More than 50.2 Hz

01- Sep -17 13.96 0.00

17- Sep -17 21.39 0.35

18- Sep -17 19.86 0.00

19- Sep -17 16.67 0.00

20- Sep -17 16.32 0.00

29- Sep -17 12.50 0.00

30- Sep -17 11.94 0.00

7.1.1.2 SRLDC informed that maximum frequency touched 50.31 Hz on 17th September 2017 at 06:04

hrs. It was observed that during the instance all the SR States drawal were under limits except

Karnataka. KAR under drawal was around 440 MW during the instance. (Graph at Annexure-

7A)

7.1.1.3 SRLDC presented the underdrawal of states when frequency was above 50.05 Hz.

(Annexure-7B). Out of 7 instances which met the criteria for frequency, sustained under

drawals were observed for Tamil Nadu in 1 instance.

7.1.1.4 The maximum under drawal touched by States are as follows:

AP : 658 MW for 30 minutes on 19.09.2017

TS : 572 MW for 05 minutes on 30.09.2017

KAR : 793 MW for 133 minutes on 19.09.2017

KER : 211 MW for 02 minutes on 17.09.2017

TN : 797 MW for 12 minutes on 16.09.2017

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7.1.1.5 Constituents were advised to kindly avoid uneconomic operation at high frequencies. It was

noted that this affects the power transfer between NEW Grid and SR grid to a great extent.MS,

SRPC requested all the constituents that action needs be taken to stick to the schedule since it

had commercial/operational impacts even for under drawals.

7.1.2 High frequency excursions w.r.t. 5.2 (j) of IEGC during load change over and remedial

measures to arrest such instances

7.1.2.1 All SLDCs/constituents were again requested to kindly adhere to the Regulations in place or

take up with appropriate forum for any exemption / amendment. Following remedial measures

to arrest high frequency operation in the Grid were noted:-

Implementation of staggered load changeover by the constituents/DISCOMs

Moderating own generation

Restricted Governor Mode of Operation of all eligible machines to be in place

Proper load management to prevent the sharp rise in frequency

ADMS healthiness

Exploring the possibility of running in pump mode the Kadamparai and Srisailam units

Planned and advance intimation for surrender of ISGS

Reduction in purchases/MTOA/STOA transactions

7.1.3 Operation of Nagarjunasagar / Srisailam / Kadamparai units in pump mode

7.1.3.1 It was noted that there was no pump mode operation at Kadamparai & Srisailam LB units

during the month of September 2017.

7.2 Low Frequency

7.2.1 It was noted that the frequency of grid operation was at times in the lower range of IEGC. The

grid had operated below IEGC range i.e. 49.90 Hz for 7.96% of time. It was also noted that the

frequency on some of the days was less than 49.90 Hz for significant duration as shown below:

Date Percentage of time of frequency

<49.2 Hz

49.2 Hz & < 49.5 Hz

49.5 Hz & < 49.7 Hz

49.7 Hz &< 49.8 Hz

49.8 Hz & < 49.9 Hz

04- Sep -17 0.00 0.00 0.28 1.18 27.15

05- Sep -17 0.00 0.00 0.00 0.42 22.50

06- Sep -17 0.00 0.00 0.00 0.63 17.43

07- Sep -17 0.00 0.00 0.00 1.53 33.13

08- Sep -17 0.00 0.00 0.56 7.01 34.10

09- Sep -17 0.00 0.00 0.28 2.08 29.10

11- Sep -17 0.00 0.00 0.00 1.32 31.39

13- Sep -17 0.00 0.00 0.00 0.21 20.35

14- Sep -17 0.00 0.00 0.00 0.28 22.92

15- Sep -17 0.00 0.00 0.00 0.69 20.63

16- Sep -17 0.00 0.00 0.00 0.56 14.38

21- Sep -17 0.00 0.00 0.00 0.28 16.32

23- Sep -17 0.00 0.00 0.42 0.49 6.74

26- Sep -17 0.00 0.00 0.00 0.63 17.99

28- Sep -17 0.00 0.00 0.00 0.14 12.85

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7.2.2 SRLDC informed that minimum frequency touched was 49.65 Hz at 18:27 hours on 23rd

September 2017. It was observed that Southern Regional states drawals were within limit

except TS which was over drawing around 234 MW during the incidence. (Graph at Annexure-

7C).

7.2.3 Overdrawal by SR constituents at frequency less than 49.90 Hz (Annexure-7D) was presented

by SRLDC. SRLDC stated that proper demand side management measures needed to be

implemented by the constituents to curtail low frequency operation. The maximum over-drawals

touched by States during September 2017 are as follows:

AP : 765 MW for 83 minutes on 15.09.2017

TS : 524 MW for 38 minutes on 11.09.2017

KAR: 577 MW for 24 minutes on 13.09..2017

KER: 334 MW for 6 minutes on 15.09.2017

TN : 797 MW for 75 minutes on 06.09.2017

7.2.4 SRPC & SRLDC felt that automatic control was required in such situations. SRLDC suggested

that ADMS settings may be changed to 49.90 Hz. and contingency plan w.r.t Tamil Nadu needs

to be reviewed considering generation loss at pooling station level. TANTRANSCO had been

suggested to revert back.

7.2.5 The following was informed by constituent states for month of September 2017 :

State/UT Load shedding in MU

Max load shedding in MW

Bilateral Purchases import (+)/export (-) in MU

Comments

AP 4.25 1081 574/259

TS 0 0 1608/5211 Agricultural supply of 9 hours was being ensured from April 2016. Agricultural supply is extended to 24 hours in 3 districts.

KAR 0 0 327/237

KER 7.0 200 452/4

TN 0 0 1837/28

PED 0.95 30

7.2.6 Messages for violation of Deviation Limits

7.2.7 SE(O), SRPC stated there were many instances of sustained under drawls and over drawals

and corresponding emergency/noncompliance messages were to be suitably issued. SRPC

analysis Ffrom 16th August 2017 to 15th September 2017 is at Annexure-7E.

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7.2.8 SRLDC presented the scattered diagram of deviations of each state. From the analysis it is

evident that sustained overdrawal/underdrawal are observed in AP(400 MW) , KAR(1,000 MW),

TS(350-400 MW) and TN( 1,000 MW). SRLDC/SRPC requested the states to take steps to

ensure that these type large quantum and sustained underdrawal/overdrawal are curtailed and

exchange of power may be explored. Kerala deviations are observed to be under limit.

7.2.9 SRLDC informed that 379 (real time-emergency/alert) messages had been issued to SR

constituents during September 2017. AP (102), TS(50), KAR(57), KER(5), TN(163),and Pudu(2).

(Annexure-7F) Beyond the real time messages issued, they are in touch with states over phone

to get the situation improved.

8 VOLTAGE PROFILE

8.1 Low voltage

8.1.1 In the Meeting it was noted that there was no low voltage as such in September 2017.

8.2 UV Relay

8.2.1 The following was noted in the 135th OCC Meeting:

State Location identified for implementation

Status of implementation /Remarks

KPTCL Somanahalli

Nelamangala

Hoody

For Second Stage a letter had been communicated to BESCOM to identify the new set of feeders as the existing list of feeders configured will not suffice the required relief.

8.2.2 In the 135th OCC Meeting BESCOM was requested to furnish the identified feeder list at the

earliest.

8.2.3 In the meeting KPTCL informed that feeders list had been received from BESCOM.

Implementation would be completed in one weeks’ time.

8.3 Installation of Shunt Capacitors (Status as on 1st October 2017 at Appendix)

8.3.1 The information regarding installation/healthy capacitors in the required format needed to be

regularly furnished every month. SRLDC requested that installation & ensuring healthiness of

capacitor banks at distribution level should be ensured by all the constituents.

8.3.2 PSS/E Base Case model has been received from the states of SR for low voltage scenario.

Complete converged network of SR had also been modeled by SRLDC/SRPC and submitted to

CPRI on 23rd March 2017 for capacitor requirement assessment

8.3.3 In the Meeting, it was noted that CPRI may be submitting the study report shortly.

8.4 High Voltage

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8.4.1 SRLDC highlighted the severity of high voltage problem at the following nodes as given in table:

8.4.2 SRLDC pointed out that the high voltage nodes are increasing in almost all the states and

requested all the concerned to initiate action to mitigate the high voltage.

8.4.3 SR II informed that due to over voltage Bidadi-Tumkur lines are tripping frequently. Bidadi –

Nelamangala line was hand tripped many times. Narendra-Hassan-Mysore-Tumkur are facing

sustained high voltages. At Hiriyur, over flux alarm is coming continuously at 220 kV side and

voltage is touching even 237 kV. Equipments like CTs/CVTs are getting damaged. He requested

SRLDC to suggest for Tap position change or KPTCL may be requested to remove capacitor

banks. KPTCL informed that 60 % of capacitor banks are switched off whenever voltages are

high. Many parallel lines are hand tripped and even 220 kV lines are hand tripped and assured

that all possible actions will be taken to curtail the over voltage

8.4.4 SRLDC noted that O/V phenomena at Bidadi started recently and will be discussed in the next

OCC Meeting. It was clarified that since the both side voltages are high, tap change at Hiriyur

STATION

MAX VOLTAGE IN KV

AVERAGE DURATION IN MINUTES PER DAY WHEN V > 420 KV/ V > 780KV

Vijayawada 431 915

N’ Sagar 428 316

Hyderabad 425 178

Gooty 432 764

Kurnool 430 698

Khammam 425 336

Vemagiri 426 263

Srisailam 435 967

Hiriyur 433 668

Guttur 426 196

Raichur 426 416

Kaiga 427 291

Narendra 431 449

Chennai 424 140

Pugalur 427 270

Malkaram 437 852

Sattenapally 430 707

Almatty 435 930

Mysore 436 617

Hassan 430 481

Mehaboobnagar 438 1022

Raichur TPS 806 71

Kurnool 765 808 114

Nellore 765 802 10

Tiruvalam 765 818 658

Nizambad 809 83

Srikakulam 808 230

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Transformer may not give desired result. Reactor installation could be considered. Hiriyur-

Nelamangala line is not allowed to open since it feds Bangalore loads. It was noted that in this

area all the lines and ICTs are injecting VARs.

8.4.5 SE(O), SRPC observed that at Hiriyur area lot of wind generation are available and reactive

support from wind generators may be explored.

8.4.6 After deliberations it was agreed that SRLDC may study the proposal of changing the tap position

at Narendra and Hiriyur as requested by Powergrid.

8.4.7 SRLDC suggested all the SLDCs to review / optimize the LT stage capacitors in service in high

voltage areas and take up the issues with DISCOMs. Action taken report could be submitted. Tap

optimization is useful only in II & IV quadrant.

8.4.8 GM, SRLDC observed that 400 kV voltages at NP Kunta substation were above 410 kV for

considerable time (more than 50 %) and some of the days though out the day. At present settings

at STATCOM are at 420 kV & 380 kV, and it was noted that available STATCOM could not be

effectively utilized for mitigating high voltage. He requested Powergrid to revise the voltage

settings to 410 kV.

8.4.9 Powergrid agreed to revise the present settings to 390 kV and 410 kV respectively.

8.4.10 Subsequently SRLDC vide letter dated 20.10.2017(Annexure-8A) had requested Powergrid to

revise the present voltage settings to 390 kV and 410 kV at the earliest.

8.5 Condenser mode of operation of Nagarjunasagar and Srisailam LB

8.5.1 In the Meeting SRLDC presented condenser mode operation of Srisailam and Nagarjunasagar

Units (Annexure-8B). Nagarjunasagar had operated upto 60 MVAR. Srisailam units have also

operated this month under condenser mode. It was noted that on some of the days there was no

MVAR absorption by N’sagar units(19th to 26th). SRLDC requested TSGENCO to take action to

absorb MVAR to the extent possible to curtail over voltages. It was noted that voltage is

maintained at 425 kV keeping many parallel lines in open condition and it is of great concern that

last option to mitigate the over voltage(opening of lines) are carried out first and first option(MVAR

absorption) is being taken up at the end.

8.5.1.1 TSGENCO informed that all the units of Nagarjunasagar except Unit I & IV can be operated in

condenser mode of operation to arrest high voltage conditions. Nagarjunasagar units were not

put under operation on few days as there was instruction from SLDC. TSTRANSCO informed that

they are also watching MVAR absorption and giving instructions to generators to absorb MVAR

as and when over voltages are observed.

8.5.1.2 Subsequently TSTRANSCO vide letter dated 13.10.2017 had addressed to TSGENCO, HPC &

HP in this regard and requested that all the units available for condenser mode of operation at

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Nagarjunasagar and Srisailam may be put into condenser mode if the bus voltage exceeds 415

kV to arrest high voltage in coordination with SLDC control room and depending on requirement

on day to day basis.

8.5.2 Status review of GT Tap positions

8.5.2.1 GT tap Positions - GT taps yet to change as per recommendation:

Station

Unit Present Tap And Corresponding Voltage(In kV)

Recommended Tap And Corresponding Voltage(In kV)

Remarks

ISTS connected Generators:

Kaiga I 1 & 2 6 & 229.125 7 & 223.25 MVAR interchange as per Special Meeting to be ensured. Kaiga II 3 & 4 3 & 409.5 4 & 399

APGENCO/APSLDC

IPPs of AP It is recommended that all IPPS under APSLDC could be advised to change their Tap position corresponding to voltage level of 400 kV / 220 kV.

KPCL/KAR SLDC

Sharavathi 9 & 10 2 & 231 4 & 220 KPCL informed that at Sharavathi new GTs (Toshiba Make) were procured for Units 9 & 10 which were expected within one years. Tap change would be carried out after receiving the ICTs.

UPCL 1 & 2 4 & 409.5 5 & 400 Observed rotor teeth temperature issues. 2 x 125 MVAR reactors agreed in 39th SCPSPSR. It was suggested that their MVAR absorption should be around 50-60 MVAR in case they are not able to change Tap.

TANGEDCO/TN SLDC

Tuticorin TPS 1,2,3,4 5

8 & 243 230 All the GTs in TTPS are kept in Tap No. 10.

MTPS St.III 1 6 & 409.5 7 & 399 Provision of Bus Reactor is being carried out by GCC/TANTRANSCO, Salem. After the provision of Bus Reactor the GT Tap will be increased to 7(399 kV) from Tap- Reactor bay works were completed at present and allotment of reactor is awaited.

MOM of 136th

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8.5.2.2 GT taps of all new units getting synchronized to grid should be kept at nominal grid voltage level

of 400 kV or 220/230 kV. SRLDC would ensure the requirement for ISTS connected generators

while SLDCs need to ensure it for their embedded generators.

8.5.2.3 SRLDC informed that MVAR testing is scheduled as follows:

TPCIL/SGPL: 16th to 17th October 2017.

NTPL: 3rd week of November 2017.

Kaiga to be firmed up.

8.5.2.4 SRLDC informed that recently Kaiga-Kodasalli maintenance works were to be carried out and the

line was taken out and Kadra bus shut down was also there. Karwar supply was to be extended

Being a Nuclear station Kaiga had expressed that they can’t charge from their end(dead bus) and

requested Kadra to charge the line from their end which they refused. Finally SRLDC discussed

with KPTCL and the supply was extended from Kadra end. It was desired that this issue would be

brought to the notice of OCC forum.

8.5.2.5 KPTCL informed that healthy line was taken out because of bus shut down. In case of faulty line

SLDC never insist to charge from generator side.

8.5.2.6 GM, SRLDC stated that whenever Kaiga-Kodasalli line is out on any fault or M/W the line will be

charged from Kadra end and synchronized at Kaiga end. Being a nuclear station Kaiga cannot be

insisted to charge from their end.

8.5.2.7 SRLDC had furnished the MVAR Capability Test Report w.r.t to BTPS Unit I (KPCL) carried out

on 09.09.2017 is at Annexure-8B-I.

8.6 MVAR Interchange/MVAR capability testing

Nodal Officers may kindly ensure that the data reaches SRLDC/SRPC in time (by fourth of

every month) so that SRLDC can correlate it with SCADA data and analysis could be done

facilitating actions for further improvement.

Recommendations finalized in the Special Meetings/Capability Testing Reports were

required to be implemented.

All the SLDCs to kindly monitor VAR absorption/injection of generating units in their

respective control areas in real-time.

Order of Hon’ble CERC dated 23.12.2009 merited attention in this regard. It had been

stated in the Order that all agencies needed to provide required reactive compensation

thus avoiding the need for exchange of reactive power to/from ISTS and maintain ISTS

voltage within specific range.

8.6.1 Regional entities to implement the steps to contain the rise in the voltages in their

respective control area stations as given below:

Ensure Bus reactors and Line reactors are switched in.

Capacitor banks especially at high voltage areas are switched off.

Optimizing the GT and ICT tap positions as per the advice of SRLDC/SRPC.

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Tap optimization at lower voltage levels to be carried out by STU/SLDC in

coordination with DISCOMs.

All the generating units on bar to absorb reactive power as per their capability limits.

Operate generating units on synchronous condenser mode for VAR absorption,

whenever feasible.

Release loads in high voltage areas keeping in view the drawl of the control area.

Maintain drawl from grid close to schedule.

Operate available hydro units on pump mode in high voltage nodes keeping in view

the drawl of the control area.

Load re- arrangement, wherever feasible, may be taken up to optimize loading on

trunk lines.

Line opening would be the last resort by SRLDC after receipt of message from the

constituents.

Concerted action/follow up by SLDC.

8.6.2 In the Meeting, SRLDC informed that in the MVAR data submitted by SGPL it is mentioned that

present tap position of GT is set at 9 corresponding to 409.5 kV. The units are injecting MVAR

even at voltages of 410 kV and above. (Presentation at Annexure-8C). SRLDC expressing

concern regarding the high voltage at Nellore area requested SGPL to change the tap position

corresponding to 400 kV and also requested to contain injection of MVAR at voltages 400 kV

and above.

8.6.3 SRLDC stated that the MVAR absorption behaviour of Ramagundam Units is observed to be not

as desired in the last few months. SRLDC presented the MVAR response of Ramagundam

Units(Annexure-8D). At present except Unit VI, absorption starts at around 409 kV only ( at 423

kV absorption is only 30 MVAR). Earlier at Ramagundam units, taps were set corresponding to

399 kV and absorption were starting from 400 kV and were giving up to 140-150 MVAR at 420

kV. SRLDC enquired whether Tap position/ LV set point had been changed.

8.6.4 NTPC clarified that tap position were the same and they would revert back after ascertaining with

the station.

8.6.5 SRLDC requested to check/review the LV set point and revert back on the same.

8.6.6 With respect to NTPL units SRLDC informed that absorption had been improved but injection to

be reduced above 400 kV.

8.7 Status review of Bus/Line Reactors, Line Reactors and STATCOM

8.7.1 Status of implementation of Bus / Line Reactors approved in the Standing Committee / SRPC

pending for commissioning by the SR constituents is furnished below:

Entity Bus Name Status REMARKS

KPTCL Hoody Reactor erected on platform. October 2017

Nelamangala Reactor erected on platform December 2017

Entity Bus Name Capacity in MVAR

Approved in

Type

Remarks

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PGCIL Yelahanka 2x63 Bus

Deferred as per 40th SCPSSR. When Madhugiri line will come it will be expedited.

Cuddapah 50 to 125 39th SC Yet to be awarded

APTRANSCO

Vemagiri 125 36th SC

Bus Kalpakka, Vemagiri and Kurnool is expected by November 2017. LoA issued on 18.06.2017. Engineering and foundation works are under progress. Awaiting for APERC approval for Chittoor Reactor. Commissioning by March 2018.

Kurnool 125 Bus

Kalpaka 125 Bus

Chittoor 125 39th SC

Vijayawada 125 39th SC

It was noted that a separate reactor at Vijayawada in scope of AP had been identified. The exact location could be firmed up by APTRANSCO.

APTRANSCO/ APGENCO

VTPS Stage IV

125 39th SC

APGENCO informed that reactor enquiry was being taken up. It was noted that this reactor was different from the APTRANSCO reactor.

KPTCL

Davangere 125 39th SC KPTCL informed that they had taken up with CEA for reviewing. During studies no reactors had been considered at that area and arrived at 125 MVAR requirement. Now two reactors had come at Guttur and Talaguppa.

Talguppa 125 39th SC

TANTRANSCO Almathy 125 39th SC Tender to be floated

Kayathar 125 39th SC Tender to be floated

TANTRANSCO/ TANGEDCO

Mettur 125 39th SC To be diverted from Palavadi and works to be taken up.

TSTRANSCO

Mamidipalli 125

36th SC

Bus Expected to be commissioned in October 2017. Civil works under progress.

Sankarapalli 125 Bus

Mehboob Nagar

125 Bus

Malkaram 125 Bus

TSTRANSCO: Sanction of funding from PSDF is received for 5 Nos of 125 MVAR reactors from MoP on 05.09.2016. Works for all five reactors awarded in September 2016 and works are in progress.

TSTRANSCO/ TSGENCO

Srisailam LB 125

Erection of GIS Bus reactor is not suggestible due to financial implications and space

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39th SC constraint in 400 kV GIS of SLBHES. Hence, the erection of Bus reactors will be examined at other end. TSGENCO was requested to take up the issue with Standing Committee.

NPCIL Kaiga 2 x 125

Bus

KGS informed that both the reactors are expected to be commissioned by December 2019. Financial approval had been received. They were in the process of floating the tender.

UPCL Udupi 2 x 125

39th SC

KPTCL had informed that the line is planned to be LILOed at Drinking water substation between UPCL and Hassan. Subsequently the studies would be put up to Standing Committee. UPCL will submit the issues to KPTCL and KPTCL will discuss with PCKL to sort out issues. UPCL had submitted all the information as required.

8.7.2 In view of very high voltage at some nodes, it was emphasized that urgent action needs to be

taken to commission reactors as committed. All the constituents were requested to update the

status of implementation of reactors on a monthly basis in the OCC Template (State wise/

location wise / status of implementation like tender called, PO placed etc) .

8.8 Reactive Power Planning

8.8.1 Status update on capacitor installation is given below:

Utility Reactive Power Planning Voltage level

Remarks

APTRANSCO

Kadapa: 273.6MVAR

Vijayawada: 136.8 MVAR

Visakhapatanam:151.2 MVAR

On 33 kV side

14.4 MVAR commissioned

0 MVAR commissioned

7.2 MVAR commissioned

APSPDCL 802 MVAR

72 MVAR commissioned

APEPDCL 276 MVAR

0 MVAR commissioned.

KPTCL Bengaluru Tr. Zone:784 MVAR

12.1 kV LOA issued. 30MVAR Installed

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Bagalkot Tr. Zone :258.1 MVAR

12.1 kV Material supplied. Erection completed/under progress. 5.8MVAR Installed

Hassan Tr. Zone 150.8 MVAR

Material supplied. Erection completed/under progress. 23.2MVAR Installed

Mysore Tr. Zone :60.9 MVAR

29 MVAR commissioned

Gulbarga Tr. Zone :98.60 MVAR

Installed Nill

Tumkur Tr. Zone :281.3 MVAR

12.1 kV 46.4 MVAR commissioned. 34.8 MVAR EI approval awaited.

KSEBL

360 MVAR

66 kV Works will be taken up after approval.

11kV

TANGEDCO 34 x 2.4 MVAR 11 kV

16 x 2.4 MVAR 22 kV 16 x 2.4 commissioned

35 x 2.4 MVAR 11 kV Tender to be floated.

51 x 2.4 MVAR 22 kV Tender to be floated

13 x 24 MAVR 110 kV BLTC note for placing of order to M/s Shreem is being submitted.

82 sets of 11 kV, 2.4 MVAR Capacitor Banks in Coimbatore Region

11 kV Tender to be floated.

822 MVAR capacitors at Distribution level had been commissioned out of 931 MVAR capacitors planned.

Balance 109 MVAR to be commissioned. However, for further enhancement of Reactive Power, Capacitor bank provisions have to be arranged by Planning/Transmission wings.

8.8.2 SRPC & SRLDC requested all the states to come up with the updated information like till date

commissioned, plan for new commissioning, quantum in working condition, action taken to

rectify/replace faulty capacitors, etc.

9 Network Protection/Security issues

9.1 U/F & df/dt Relays Schemes

9.1.1 Implementation of SRPC recommended quantum

It was noted that all the States had implemented AUFR and df/dt schemes fully. All the

Constituents were requested to furnish the details of the feeders implemented in AUFR & df/dt

schemes along with the status of SCADA mapping as per the specified Formats.

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In accordance with clause 9 (2) of CEA (Grid Standards) Regulations, 2010, all constituents

shall submit a detailed report of operation of AUFR at different frequencies to SRLDC and

SRPC on daily basis. It was noted that only KSEBL and PED were submitting the daily report

regarding operation of relays.

9.1.1.1 SRLDC presented the load relief realized as a percentage of AUFR quantum declared in the

identified feeders during the month of September 2017 as follows: (Presentation at Annexure-

9A)

AP: 74 %, TS: 61 % KAR: 56 %, KER: 80 %, TN: 58 %, Pudu: 77%. SR : 61 %.

9.1.1.2 SRPC & SRLDC expressed concern that the load relief observed in real time in respect of

KAR, TS and TN was very less.

9.1.1.3 TANTRANSCO informed that transducer issues were getting addressed.

9.1.1.4 SRPC/SRLDC suggested that TN/KAR/TS may analyze the relief on each feeders and sort

out the feeders which are giving less relief. Accordingly additional feeders may be increased.

9.1.1.5 TSTRANSCO informed that as per their analysis also ,relief is coming as 61 % and the less

relief is due to the demand drop due to rains in the state because of less load on the feeders.

Initially there was a discrepancy in the data and the relief shown was less and at present after

rectifying the entire issues relief realisation was more except last month.

9.1.1.6 KPTCL informed that the less realisation is due to demand drop in the state. It was noted that

KPTCL had declared more than actually recommended. KPTCL was requested to review the

average relief values of the feeders identified. It was also noted that KPTCL had identified

more feeders(quantum) in lower stage(III) which may not fully serve the purpose of the system

protection security and requested them to review it and identify stage wise as recommended.

Stage I identified quantum was noted to be less.

9.1.1.7 OCC forum appreciated APTRANSCO for the higher realisation and observed that their

realisation had achieved around 92 % in some of the months.

9.1.1.8 SE(O), SRPC informed in respect to Karnataka and Andhra Pradesh that it had been observed

during the UFR/df/dt Relay inspection that many of the feeders with RE injection also had

been identified for trippings and requested all the constituents to exclude those feeders and

revise the feeder list including different feeders. Segregation of feeders also needs to be taken

up.

9.1.1.9 MS, SRPC expressed concern that less realization was threat to system security. The issue

needed to be addressed and was to be reviewed appropriately. If required, additional feeders

may be required to be identified. He suggested that from next month onwards the analysis

may be carried out for the last six months and accordingly if average is noticed to be less

states may be recommended to add the feeders or change the feeders.

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9.1.2 SCADA mapping of feeders of AUFR &df/dt schemes

9.1.2.1 As per CERC vide Order dated 27.11.2015 on Petition No. 60/MP/2014, SRPC vide letter

dated 29.01.2016 had submitted the status report duly certified by SRLDC and SRPC w.r.t

implementation of SCADA mapping of all the constituents to Hon’ble CERC. SCADA mapping

confirmation report of KSEBL had also been submitted to Hon’ble CERC.

The status update as per SRLDC after validation of all the States is as follows:

State SCADA mapped

%

Status

AP 59.3 APTRANSCO informed that 20 RTUs had been

commissioned out of 25. 5 would be

commissioned shortly. Balance RTUs are covered

under OPGW scheme approved through PSDF.

TS 78.3 TSSLDC informed that 6 RTUs had been provided

for Solar Generators and for 17 RTUs,

procurement was being taken up and it could take

4-5 months. There were 18 RTUs for Interstate

feeders and some would provide UFR and df/dt

relief quantum also. With this they were likely to

achieve 100% mapping.

KAR 99.8

KSEB 98

TN 92 Additional RTUs needed to be procured for 100%

SCADA mapping. Transducers to be procured.

SRPC/SRLDC requested that a monthly report on the action taken to reach 100 %

availability may be furnished to SRPC/SRLDC.

9.1.2.2 All the States were requested to kindly initiate the action to achieve 100 % SCADA visibility.

10 SPS operations

10.1 SRLDC informed that there was no SPS Operations during the month of September 2017.

10.2 It was noted that as decided in the 135th OCC Meeting mock test on SPS of Talcher-Kolar poles

were carried out on 27.09.2017. Mock test was conducted for testing the SPS signal transmission

from Kolar HVDC station to respective load points without actual tripping of loads. SRLDC had

furnished a Report (Annexure-10A) and the summary is given below:

Talcher-Kolar Trip Signal-1 received at all the locations.

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Talcher-Kolar Trip Signal -2 received at all The locations in TN, Kerala &

Karnataka. Signal received at all the locations except 400 kV Narnoor (faulty

multiplexer) for AP.

Talcher-Kolar Trip Signal -3 received at all the locations.

Talcher-Kolar SPS taken into service after completion of Mock-testing at 12:18 hrs.

10.3 Dy CE, KSEBL informed that Trip Signal II was received in the DTPCs at Kanhirode and

Madakkathara at 11:38 hours and Trip Signal III received at locations 220 kV Edappon and

Pallom at 12:04 hours. The system was normalised at respective stations after getting

normalisation code from SRLDC. He informed that the following were observed after

normalisation and requested Powergrid to look into the issue and rectify the same

While restoring the trip circuit from DTPC to the respective feeders tripping occurred at 220

kV substation Pallom due to the acting of T-K signal III. Tripping had happened due to the

fault in the interface card of DTPC at Pallom. After replacing the faulty interface card with

the available spare at station, the system was normalised.

At Madakkathara and Kanjirode it was observed that a major alarm indication was

intermittently present in the DTPC module.

10.4 KSEBL letter in this regard at Annexure-10B

Powergrid agreed to look into the issue at the earliest.

10.5 SRLDC informed that except Narnoor all the stations had received the signals. Multiplexer issue at

Narnoor was identified even during the mock exercise carried out on 23rd March 2017. SRLDC

enquired APTRANSCO about the delay in rectifying the issue.

10.6 APTRANSCO informed that the Multiplexer had reached Narnoor and cabling works are over and

will be in operational within one week.

10.7 System Protection using Optimization Technique (SPOT)- SRLDC proposal

10.7.1 System Protection using Optimization Technique (SPOT) Engine was discussed in earlier OCC

Meetings.

10.7.2 SRLDC suggested dropping the issue, till some concrete proposal is firmed up.

10.8 Automatic Demand Side Management Scheme (Petition No. 250/MP/2012) & GSES

(Petition No. 265/MP/2012)

10.8.1 In the Meeting SRLDC pointed out the following:

ADMS(Proposed) Operation with 49.9 Hz, 15 Min, OD 250MW

94 Instances met the requirement for frequency.

12 instance for AP

1 instance in KAR

16 instances for Tamil Nadu

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3 instances in Telangana

10.8.2 At present setting there were around 48 instances when the frequency was below 49.8 Hz. out

of which only one instance (AP) was matching with ADMS operation and frequency range was

49.72 to 49.78 Hz, OD by AP was 282-400 MW(9th September 2017) . Between 49.9 Hz. and

49.8 Hz. states are not supposed to operate many instances of over drawals are noted and

manual intervention is not sufficient. If settings were at 49.9 Hz.(proposed) in auto mode ADMS

would have been acted to safeguard the system.

10.8.3 SRPC endorsed the views of SRLDC and suggested that change in the settings was required

keeping in view coal shortages, wind withdrawal, higher RE ingress, duration of frequency below

IEGC range and since manual action seems to inadequate .

10.8.4 TSTRANSCO felt that it is not a regulator phenomena change of settings may not be required.

After the limit the OD to 250 MW the only option left out was manual load shedding and suggested

that changing the settings can be reviewed in next TCC/SRPC Meetings or after discussing in

Higher forum. SRLDC/SRPC clarified that ADMS will take care of such situations and will reduce

the pressure on SLDC system operator.

10.8.5 Dy. CE, KSEBL informed that instructions are given to operators to manually interrupt the loads

/judiciously switch off the feeders whenever deviations are observed and not left out only to

ADMS operation. He also enquired whether all the other regions had implemented the revised

settings.

10.8.6 TANTRANSCO informed that they cannot concur to revised settings. It is very difficult for them to

limit the drawal to 250 MW since they are managing with a huge quantum of wind generation.

TANTRANSCO informed that revision can be considered in no wind season and the proposal will

be apprised to Management. SRLDC pointed out that the concern of TN has been noted by

Hon’ble CERC in many of the Petitions and Commission in its Orders have stated that Grid Code

has to be followed and system security cannot be put under threat.

10.8.7 APTRANSCO informed that they will apprise their Higher management about the change in

settings recommendations.

10.8.8 After deliberations it was decided that the setting would be revised to 49.85 Hz and below for

frequency and for deviation of minimum DSM limits for 15 minutes. It would be reviewed for few

months and setting may be changed to 49.90 Hz (IEGC limit) in next step. Implementation of the

revised setting will be from 01.11.2017. An alarm can be set at 49.90 Hz and below for 10 minutes

to enable SLDC operator to take manual action. Also the performance/functioning of ADMS is

required to be tested periodically by the respective SLDCs following the practices similar to that

carried out by Kerala. It was requested to communicate the confirmation of revised logic

implementation to SRLDC/SRPC.

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10.8.9 SRLDC had pointed out that similar to existing ADMS logic (O/D), backing down of generation

during the sustained U/Ds during high grid frequency may be required. It was observed that

KSEBL and KPTCL were having provisions of tripping/backing down of the generators in case of

U/Ds during high frequency. States were requested to examine the technical feasibility/provision

for backing down of generators and revert back.

10.9 Grouping of loads (IEGC clause 5.4.2 (e))

10.9.1 As per IEGC, to maintain the frequency within stipulated band and also to ensure network

security, the interruptible loads were to be arranged in four groups of loads, This was for the

purpose of scheduled power cuts/load shedding, loads for unscheduled load shedding, loads to

be shed through UF relays, df/dt relays and loads to be shed under any SPS scheme. These

loads are to be grouped in such a manner that there is no overlapping between different groups

of loads.

10.9.2 The issue was noted for compliance by the concerned utilities. SRLDC requested all the states to

kindly furnish the updated details in this regard.

10.10 Tripping Details/Reports

In various forums SRLDC had raised concern that it was not getting tripping information/data

within 24 hrs as per IEGC/CEA regulations and sometimes the information from both the ends

was not being received. Also at times, tripping details only were being received without DR& EL

details. SRLDC was unable to analyse events on account of non-receipt of details of tripping in a

timely manner. SRLDC had stated that all tripping details should be uploaded on the SRLDC web

portal. Para 29 of Hon’ble CERC Order dated 20.02.2014 in respect of Petition No.146/MP/2013

was brought to attention of the OCC. Non-furnishing of timely tripping details would be treated as

non-compliance. Procedure for timely furnishing information was needed to be streamlined by the

utilities. It was noted that tripping information details were to be uploaded within the stipulated

time frames.

10.11 Declaration of availability and healthiness of various protection / defense mechanism

10.11.1 SRLDC stated that the healthiness certification was not being received in timely manner from all

the constituents.

10.11.2 Healthiness certificates and other reports were being sought as per directives of higher bodies.

Validated certificates needed to be communicated in a timely manner.

10.12 LVRT Implementation

10.12.1 Hon’ble CERC has passed Order in respect of Petition No. 420/MP/2014 on 05.01.2016. The

Order directs a number of actionable points by various utilities for compliance of LVRT, CEA &

CERC Regulations etc. Three Special Meeting were conducted at SRPC Bangalore on

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05.02.2016, 18.04.2016 & 05.07.2016 (Meeting minutes are available at SRPC website). This

issue was further discussed in the Special TCC Meeting held on 02.08.2016.

10.12.2 In the Meeting, it was decided that next LVRT Meeting may be conducted on 25.10.2017.

11 Formulation of plan for procurement and Placement of Emergency Restoration System (ERS) in the country

11.1 As per ERS requirement outlined in MoP letter dated 05.12.2014, status update on ERS is given

below:

Transmission Utility

Requirement as per MoP

Existing Status/Remarks

APTRANSCO 3 2 ERS III-submitted for approval of PSDF funding.

TSTRANSCO 1 TSTRANSCO had informed that earlier tender had been cancelled and it was being retendered. Subsequently, it would be taken up for PSDF funding.

KPTCL 2 2

KSEBL 1 Tenders to be floated. Being followed up.

TANTRANSCO 2 Retendering.

PED NIL NIL

PGCIL 4 (2 Nos. Additional)

4 (SR I & SR II is having 2 no. Each)

765 KV ERS (one each for SR-I and SR-II) tendering under progress.

11.2 CEA vide letter dated 21.07.2017 had informed that a Meeting was held in the Cabinet

secretariat under the Chairmanship of Secretary (Security) on 28th June 2017 to discuss the

action taken report on the decisions taken at the early meeting on 9.03.2016 on the Crisis

Management Plan in respect of MoP. It was noted that ERS were in procurement stage in most

of the states and the response from the states was not very encouraging. Secretary (Security)

has sought a note from CEA in the matter so that he may take up the matter with the concerned

States at the highest level. CEA requested that state wise requirement and current availability of

ERS and the action taken on/status of procurement of ERS may please be sent to GM Division

for onward transmission to Cabinet Secretariat.

11.3 Subsequently SRPC vide letter dated 01.08.2017 had submitted the required information to GM

Division, CEA.

12 SCADA AND COMMUNICATION

12.1 A Special Meeting was held on 07.02.2017 to deliberate on pending SCADA/Communication

issues. Minutes of the Meeting is uploaded on SRPC website. The status of pending Items as

deliberated in the Special Meeting/Subsequent OCC meetings as updated is as follows:

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S.No Issue Action Plan

1 Meeting with M/s ALSTOM

regarding AMC issues,

punch points

8.5 Alstom completed the pending works except some of the on-site training modules, for which schedule was given Alstom to complete by September 2017.

8.6 PGCIL informed that deduction amount had been communicated.

8.7 KSEBL requested for detailed breakup of the payments. 8.8 SR I informed that they had requested AP & TS for the

deductions on account of delay. 8.9 TSTRANSCO informed that they had requested for

modification in EMS package which they would be taking up as a separate order with M/s ALSTOM for around 77 Lacks.

8.10 TSTRANSCO had requested estimate for back up SLDC. PGCIL informed that the request had been communicated to Head Quarters.

2 ICCP link between RTAMC and SRLDC

Link is established and database tables have been exchanged. ICCP association is in progress by SRLDC and NTAMC/Manesar. SR II RTAMC provided the data & SRLDC to further carry out the job.

3 Data discrepancies in ISGS/IPP/PGCIL/STUs

Fresh list of points received from SRLDC on 05.07.2017 and same shall be attended by July end.

4 Providing additional RTU at NTPC Talcher

Material received and will be commissioned by the end of October 2017

5 Protection coupler replacement for Kayamkulam Transmission system

Letter from KSEBL received on 23.05.2017. Actual expenditure of Protection Couplers towards PGCIL assets shall be borne by PGCIL at the rates of LOA to be placed by M/s KSEBL. KSEBL to examine the option of buyback of the old panels to be looked into or handover the panels to PGCIL. .

6 OPGW stringing on balance portion of KPTCL lines

Except Hassan-Santhigrama (7.4 kM) OPGW stringing is completed on all the lines of KPTCL. Because of non-readiness of direct line, KPTCL recommended to execute the connectivity through 3 different lines of 35 km and the same may not be possible in the on-going project as the supplies are completed.

7 Migration of SCADA periphery in line with SEM

Both AP & TS: Migrated to SEM based philosophy from 11:00 hours of 09.05.2017. TN migrated on 08.06.2017. KPTCL migrated from 04.07.2017.

8 SCADA Data failure Protocol

RTU not reporting/data failure would be communicated to the concerned entity/user with a copy to PGCIL. User would take lead role in getting the issue resolved. User/SRLDC would ensure necessary verification at their ends as explained in the training. Parallely, PGCIL would look into communication issues. User/SRLDC would appraise PGCIL about the verification at their end for PGCIL to sort out the communication issues.

Official email ID for SCADA issues to be created for each entity/User involved for easier communication and proper delivery of information. All correspondences regarding any SCADA issue to be made through this mail ID only. Details to be communicated to SRLDC/SRPC within a weeks’ time.

SR II informed that the procedure is being followed

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9 Integration of new elements in SRLDC/SLDC SCADA

SR I /SRII noted and shall be complied.

10 Issues with Orange Exchange

It was noted in the Meeting that a Meeting was held on 16.03.2017 at SR II Bangalore and the issues are being addressed. Except Remote sub-scriber units with PLCC links, all issues have been addressed.

12.2 SRLDC had invited attention of the forum that CERC had brought out Order on Suo moto

Petition 007/SM/2014 dated 29.01.2016 regarding SCADA. It was directed by Hon’ble CERC

that NLDC and respective RLDC are directed to update the status of telemetry every month at

their website and persistent non-availability of data from the generating stations/substations be

taken up in RPC meeting for appropriate direction and action. Also, NLDC had been directed

to submit user wise latest telemetry by 31.08.2016. SRLDC informed that they had started

posting this information from February 2016 on their website.

12.3 In the Meeting, GM, SRLDC expressed the issues regarding the Data Availability and

requested Powergrid’s active participation to resolve the issue. The system was installed in

view that the old system was not capable of handling huge data and was hanging. In GE

system, Y connector problems, redundant path, DCPC hanging issues etc were encountered.

He expressed concern that not even one hour of a single day, there is 100 % data availability

and it is reflecting in the drawal computation and leading to dispute in the real time. He added

that the same difficulties are being faced with communication also. He observed that the hot

line communications are mainly meant for meeting the crisis /contingency situations to make

use for BSRPs. He requested Powergrid to make available at least one communication facility

in Control room which can be extended to sub stations or security which can be made use of

in contingencies . He informed that it has been observed that data for many elements stops

reporting after trial operation and commissioning after few days and the same need to be

followed with inclusion in data discrepancy list. It was the approved procedure that in case of

no fibre cut the issue will be attended within three hours and in case of fibre cut within a day

and cases which cannot be solved in time it will be escalated to senior management level and

referred to OEM etc. He expressed concern that there were occasions where even one week

data was not available. He requested to deliberate on the way forward to mitigate these

issues for better system operation since most of the data comes from Powergrid stations.

State data are also not coming properly. Kayathar data is not coming and it was informed that

it will take more than three months to resolve. AP-Telangana tie lines data is hanging in some

of the places. He pointed out that Regulations also have been notified and it is mandatory to

assure 100 % communication/data availability.

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12.4 SR I informed that they are facing some issues with orange communication. At present most of

the substations are made unmanned except some of the critical sub stations like Vizag and

Nellore. There are 7 critical stations which are manned at present. The intentions of SRLDC

are well noted and whenever RLDC is informing regarding non operation of the phones the

personnel were sent to the respective stations and it was being attended. Regarding data

availability, fibre cut whenever Whats App messages are received the issues are being

attended urgently.

12.5 GM, SRLDC informed that they are facing problem with stations where only BSNL

communications are available and in old stations like Sriperumbudur, Warngal etc. It was

noted that most of the issues are observed at morning or evening peak hours. He requested

Powergrid to make available of an identified official on 24/7 hours basis who will look into the

communication / data availability issues.

12.6 SR-I informed that one official is deputed specifically for looking into communication and ULDC

issues. A separate official is taking care of hardware issues. Apart from shift person , one

person is there from RTAMC also. Warangal had a hardware issue, one of the data card had

gone and loop test was to be carried out. Except Nizamabad all communication channels had

been shifted to fibre network.

12.7 SRLDC pointed out that Warangal is one of the drawal point for Telangana and problem at

Warangal was affecting the drawal computation of Telangana. In Tamil Nadu Kayathar-

Kanarpetty area data was not available for more than 6 months. In Karnataka Hiriyur-

Nelamangala –Gooty data was unstable. As on date (09.10.2017) Raichur, Arasur, Hosur,

Salem, Dharmapuri data were not available.

12.8 MS SRPC noted that as per recent communication regulations the percentage availability

mandated was quite high. SRLDC stated that already provisions are there in Terms and

Conditions of Tariff which was not invoked by it yet.

12.9 SR II confirmed that SCADA maintenance protocol was being followed by SR II.

12.10 After deliberations it was decided that a Special Meeting may be convened to have focused

discussion on the issues on 27th October 2017 at SRPC Bengaluru.

12.11 Subsequently A Special Meeting was convened at SRPC Bangalore to deliberate on the issues

w.r.t URTDSM / SCADA / Communication issues and minutes of the Meeting are available at

SRPC website.

12.12 Compiled Telemetry status – Utility wise- as directed by Hon’ble Commission

Hon’ble Commission vide order dated 19.12.2013 on Suo-moto petition No. 56/SM/2013

had directed all the utilities to provide the required telemetry within six months of this order.

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It was requested that MAPS, KGS & KKNPP may please furnish the compliance status of

pending SCADA inputs the earliest. Details in this regard were available on SRLDC web

site.

For KKNPP only 2 points are pending w.r.t GT tap position. Re -tendering was going on

and it will take 5 more months to complete the works.

12.13 PHYSICAL AND CYBER SECURITY/CRISIS MANAGEMENT PLAN/BLACK START

PROCEDURE

12.13.1 Physical and Cyber Security

Status update on Crisis Management Plan(C&DMP) of Power Sector is to be furnished every

quarter. Information regarding Cyber Security was to be furnished to Chief Engineer, DPD,

CEA, Sewa Bhavan, New Delhi-110066. Report on Physical Security, other Mock Drills for

CMP, Mock Drill for Black Start Restoration was to be furnished Chief Engineer, DMLF, CEA,

Sewa Bhavan, New Delhi-110066. A copy of the reports was to be sent to SRPC Secretariat

(mssrpc-ka@nic.in and seoprnsrpc-ka@nic.in). Information required by CEA (vide letter dated

26.11.2013) regarding Security of power installations was to be furnished to CEA.

12.14 Black Start Procedure

12.14.1 In earlier OCC Meetings, SRPC/SRLDC had expressed concern that black start mock test

procedure is not being followed properly, mock exercise by point to point method is not

carried out by all and schedules are also not being furnished. All the concerned entities were

requested to furnish the details of BSRP Mock test completed during 2nd half i.e July 2017

to Dec 2017 and schedule for next year ie Jan 2018 to June 2018 t.

12.14.2 In case of postponement or non-conducting of mock drill exercise then it must be intimated to

SRLDC along with the reason.

12.14.3 The following was noted in the Meeting:

KKNPP mock exercise on was firmed up on 31.10.2017

Kaiga GS mock exercise to be firmed up during S/D in November 2017.

AP has confirmed BSRP workshop for VTPS for 27.10.2017

Kerala date finalised in the last meeting, venue to be finalised.

All future workshops conducted in states: BSRP System Restoration presentations of

respective states to be presented by SLDC and SRLDC will be presenting Regulatory

aspects, RGMO, MVAR, SR Overview etc. Necessary assistance will be given to SLDC for

gearing up.

12.15 Conducting mock exercise from RTPS to Jurala, Nagheri to BTPS

12.15.1 In the Meeting, SRLDC informed that as per SRLDC records Upper Jurala and Lower Jurala

are having Self Start facility which can be utilised during black start restoration. It was

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observed during the BSRP workshop at Telangana that 2 nos of DG set available (2 x 250

KVA) at Jurala were not sufficient for starting one unit (40 MW) and auxiliaries at Jurala for

black start. Upper Jurala and Lower Jurala being an important station of Telanagana for

black start activity TS need to take immediate action to upgrade the DG capacity so that at

least minimum one unit can be started from black start. The action plan needed to be

communicated to SRPC/SRLDC.

12.15.2 It was decided that SRLDC will take up with TSSLDC regarding this highlighting the

provisions of CEA(Technical Standards for connectivity to the Grid), Amendment Regulations,

2013 and CEA, (Technical Standards for construction of electrical plants and Electric lines)

Regulations 2010. Subsequently vide letter dated 13.10.2017 (Annexure-12A) SRLDC had

taken up the issue with TSSLDC.

12.15.3 TSTRANSCO vide letter dated 13.10.2017 (Annexure-12B) had taken up the issue with

TSGENCO and had requested to arrange adequate capacity of DG set for supplyingg

auxiliary power supply to start the units at Upper Jurala.

12.15.4 On a query from GM, SRLDC regarding Bhadravathi alternate power supply PGCIL informed

that they had put a 250 MVA, 400 kV transformer diverted from Moga , and commissioning

details would be shared.

12.15.5 SRLDC recalled that three stations, Harthi, Gadag and Lingapur have confirmed that double

bus is available. Some modifications are going on at Harthi and Gadag . After the rectification

works the mock exercise may be planned . During the mock exercise at BTPS it was assured

that they will complete the works within 15 days. SRLDC requested KPTCL to take up the

issue on immediate basis. It was suggested that by November first week mock exercise could

be completed.

12.15.6 SRLDC expressed concern that most of the SR constituents had slipped from the mock drill

exercise schedules submitted by them and requested all constituents to furnish the status

update and reasons for slippage. Constituents were requested to conduct the point to point

mock drill. The format attached with the letter needed to be filled by the respective states and

sent to SRLDC within 10 days. It was also requested to submit the reports of mock exercise

carried out within 7 days.

12.15.7 KGS and MAPS are requested to furnish the details regarding House Load Operation and

regarding restoration from complete black out of the Units.

12.16 Priority for Railways/Metros in the matter of Restoration of Supply

12.16.1 The following had been noted in earlier Meetings:

KPTCL: to expedite on the actionable points of KPTCL/BMRCL which were finalized in

the Special Meeting.

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KSEBL: Vide letter dated 06.06.2016 had furnished the Operating Procedure for

extending supply of power to Kochi Metro.

TANTRANSCO/Southern Railway: The follow up of actionable points finalized in the

special meeting in respect of Chennai Metro may be expedited

TSTRANSCO: was requested to take proactive action in respect of Hyderabad Metro.

12.16.2 In the Meeting, TSTRANSCO was requested to take up the issues with Hyderabad Metro and

if needed Meeting also may be convened. TSTRANSCO informed that as per records Metro

was supposed to come by this year end.

13 RGMO/FGMO

13.1 RGMO response had been deliberated in various Special/OCC/TCC/SRPC meetings.

Inadequate response was an area of serious concern and there was no noticeable

improvement. MS, SRPC had stated that the recommendations finalized in the special

RGMO/MVAR interchange meeting should be complied by all the utilities.

13.2 In earlier OCC Meetings, the following had been noted:

SLDCs were requested to analyze the RGMO instances posted by SRLDC for the

generators in their control area and take up action as per the Order on Petition No.

84/MP/2015. Inadequate Response to be taken up with SERC (Petition No.302/MP/2013).

Action on recommendations finalized in the Special Meetings needed to be taken by

generators/states. All generators were kindly requested to take all steps to ensure intended

RGMO/FGMO response.

RGMO logic for all the generating stations shall be revised as per the IEGC 5th amendment

regulations.

13.3 RGMO implementation/ Extension of RGMO status point to SLDC

State/Entity RGMO Status extension to

SLDC/SRLDC

Comment

TS Thermal updated. Hydro

Manually updated at the

TSSLDC

TSTRANSCO is requested to take up the

issue with GENCO and solve the issue

KAR RTPS-4, Supa and LDPH RTPS Unit IV: will be made available

during R & M works. LDPH: Carried out

the works. Complete wiring is over.

Extended upto SLDC. Supa: yet to be

carried out.

KER Sholayar Sholayar: one unit extended. Rest will be

extended during R & M.

13.4 The following was noted in the 135th OCC Meeting:

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SRLDC/SRPC expressed serious concern over the very low percentage of response

especially from TRANTRANSCO and ISGS. TANTRANSCO was suggested to take up the

issue with TANGEDCO regarding the poor response.

It was decided that each state may conduct a special meeting at SLDC with generators

under their control areas including IPPs and SRLDC/SRPC can join the Meeting by VC.

ISGS Stations may be separately called for a Meeting and each generator may be

requested to give a presentation on the performance of respective Generators unit wise.

As per 5th Amendment to IEGC, gas stations above 50 MW Installed Capacity also should

come under RGMO/FGMO Operation from 1st October 2017. SLDCs were requested to

take action to comply the Amendment. AP, TN and NTPC (Kayamkulam) were requested

to take up the issue seriously with respective generators.

All generators should keep a Margin for RGMO response while declaring DC in all level ie

at full load/partial load operation.

13.5 Subsequently a Meeting was conducted by TNSLDC through VC on 25.09.2017 and RGMO

response of TN generators was discussed in detail. SRLDC vide letter dated 26.09.2017 had

communicated to TNSLDC regarding the actions taken to improve the performance. It was

requested to TNSLDC that the issues may kindly take up with generators for time bound

resolution. It was also requested to update the status in the forth coming OCC Meeting.

13.6 RGMO meeting was conducted on 27.09.2017 at SRLDC, Bengaluru, with participation from all

CGS / ISGS generating station, ISTS Connected MPPs, SRPC and SRLDC. RGMO response

of the generators, RGMO status point extension & healthiness and new logic implementation

as per IEGC 5th Amendment etc were discussed during the meeting. SRLDC vide letter dated

04.10.2017 (Annexure-13A) had listed out some points which were observed during the

meeting. The Station-wise actionable points/recommendations were also enclosed.

13.7 TSTRANSCO vide letter dated 22.09.2017(Annexure-13B) had taken up the issue of non

performance of RGMO response with STPP Unit I & II.

13.8 It was noted that as per 5th Amendment to IEGC, gas stations above 50 MW Installed Capacity

also should come under RGMO/FGMO Operation from 1st October 2017. SLDCs wetre

requested to take action to comply the Amendment. AP, TN and NTPC (Kayamkulam) were

requested to take up the issue seriously with respective generators.

13.9 SRLDC emphasised that all generators should keep adequate Margin for RGMO response while

declaring DC. Merely not operating in wide valve does not guarantee that there is margin for

RGMO response, but margin is to be ensured at all generation levels.

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13.10 TANTRANSCO informed that they had requested gas stations to give the action plan and it

was informed that they are planning to approach CERC for exemption since gas availability is

very less. TTPS - Unit V came under RGMO on 26.09.2017. With respect to Hydro stations it

was informed that exemption has received for all irrigation based hydro stations and others yet

to be received.

13.11 MS, SRPC clarified that even though Hon’ble Commission is approached for any exemption,

till the same is received, stations would need to deliver the required performance as per the

Regulation in force.

13.12 SRLDC requested that the list of all hydro stations and gas stations which are covered under

FGMO/RGMO response along with the status clearly mentioning the CERC order in case

exemption/extension is received from Commission may be furnished.

13.13 IL & FS informed that in July 2017 they had done some fine tuning. During the next incident

both the Units were out of bar and they couldn’t carry out the analysis. SE(O), SRPC

requested IL & FS to ensure the representation in all the Meetings which was agreed by IL &

FS.

13.14 MS, SRPC requested NLC to coordinate with the concern to rectify all the issues like RGMO

Status point mismatch at NLC TS I Expansion etc. on immediate basis(commitment for

rectification as agreed in the meting was 7th October 2017). NLC TS I Expansion needed to

remove the load limiter, which is preventing the governors from providing response, as agreed

in the special meeting and it was reiterated that no load limiters should be put into service.

13.15 NLC informed that the issue is with RTU and they had requested for Power grid support in

rectifying the problem. PGCIL had agreed to extend support. Action will be taken to remove

load limiter.

13.16 With respect to Talcher it was noted that status point was to be extended and the analysis was

to be submitted for the incidents.

13.17 Talcher representative informed that new RTU to be integrated to make available of status

point by October end. MS, SRPC recalled that in the special meeting held with ISTS

generators NTPC representative had assured that Talcher Stage II status point will be

extended to SRLDC by October 2017 and analysis for the past incidences would also be

submitted by them.

13.18 SRPC/SRLDC clarified that even though Talcher Stage II is located in ER, electrically it was

with SR. Representation to Sub Committee/ RGMO meetings along with analysis needed to be

ensured.

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13.19 NTPC SRHQ assured that all relevant communications would be passed on to Talcher NTPC.

It was noted that already Talcher Stage II is in the RGMO Group. The last meeting was not

attended since they were busy with Directors’ visit.

13.20 It was observed that Kudgi response is not available and suggested that Kudgi also will be

added to the group and Kudgi was requested to come up with analysis.

13.21 RGMO analysis for Units 1, 2 & 3 of Ramagundam for the incidents needed to be submitted as

agreed in the Special Meeting. It had been agreed in the 27.09.2017 Meeting that the

analysis would be submitted within a week.

13.22 SRLDC requested all the states(except Tamil Nadu) to finalize the dates for RGMO meetings

and may be informed accordingly(within three days) so that SRPC/SRLDC may also

participate through VC. SLDCs are requested to convene the meeting with all generators in

their control area including embedded private generators.

14 TRANSMISSION NETWORK ISSUES AND SYSTEM OPERATION ISSUES

14.1 Loadability of ICTs and revisit of the associated protection settings to prevent cascade tripping of

ICTs/high loading of transmission lines. Insufficient action in controlling the loading of ICTs

leads to N-1 criteria violation in compliance of Regulation 3.1 f(8) of CEA(Grid Standards)

Regulations 2010 and Regulation 3.5 a(i) of CERC Indian Electricity Grid Code Regulations

2010.

14.2 Over Loading of both ICTs and N-1 violation at Hoody, Gazuwaka, Nellore.

14.3 SRLDC requested all the constituents that whenever real time messages were issued to control

over ICT loadings, constituents should be committed to take necessary steps/load shedding to

curtail the overloading. SRLDC requested for urgent action to alleviate the loading of 400/220

kV ICTs. A long term solution of augmentation/load reconfiguration needed to be considered /

implemented in view of grid security. Action Plan of constituents to restrict the loading to

permissible limit may kindly be furnished to SRLDC and immediate action needs to be

initiated.

15 Prolonged Outages

15.1 Status review of prolonged outage of grid elements in SR & realistic action plan for revival of

the prolonged outage was awaited from some of the constituents. Monthly reports are

required to be submitted to CERC.

15.2 The following was noted in the Meeting:

KKNPP had informed in the 32nd SRPC Meeting that the Rectors-1 & 2 would be back in

service after rectification in December 2017 and June 2018 respectively.

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All constituents were requested to convey the schedule of revival for the elements under

prolonged outage to SRPC, which was to be reported to Hon’ble CERC on monthly basis.

(CERC Order on petition no 146/MP/2013).

15.3 Closing of 220 kV Upper Sileru- Balimela line

Upper Sileru - Balimela line had been idle charged from 8th January 2015 from Upper Sileru

end.

16 Upcoming Generating Stations

16.1 Central Sector

Station Unit Installed Capacity

MW

Scheduled date of synchronizing / commissioning

Remarks

NTPC

Kudgi TPS Stage-I

I,II, III

3 x 800= 2400

Unit-I

CoD from

31.07.2017

Unit-II.

CoD by October 17

Unit–III

CoD by Dec 17

NTPC had confirmed that full

DC would be ensured from

April 2018.

Telangana STPP Phase I

2 x 800 U-I CoD Jan 2020 U-2 CoD June 2020

Pudimadaka AP 4 x 1000 52 Months from Zero Date

85% share to AP. Zero date yet to be finalized. AP requested NTPC to firm up the zero date at the earliest. AP informed evacuation system would be developed by PGCIL

30th TCC: NTPC informed that the domestic coal was yet to be tied up. APTRANSCO informed that they would apply for LTA with CTU after the coal linkage is firmed up.

NLC

New Thermal Power Project

I 500 April 2018 CTU had informed that for evacuation LILO of Neyveli - Puducherry and 400 kV D/C to Araliyur lines are planned. NLC had applied for LTA of 340 MW which could be managed with the LILO of Neyveli – Puducherry. Balance 600 MW would be catered by 230 kV system of TANTRANSCO. Araliyur S/S was being developed by TANTRASCO and was expected by June 2018

II 500 April 2018

NPCIL

BHAVINI

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Kalpakkam (PFBR)

I 500 Synchronization by

2017-18

COD by 2017-18

Synchronization by March 2017 COD by Sep 2017

UMPP

Krishnapatnam 3960 (6 x 660)

APEPDCL and PCKL had taken steps with their legal counsel to expedite the hearing before Honorable High Court of Delhi

Cheyyur 4000 New bids would be called

NEW PROJECTS OF STATE SECTOR & IPP

Updated status of new projects of State sector is furnished below:

Sl No

Name of project Located in

Capacity in MW

Commissioning Schedule /Remarks

1 Rayalaseema TPS ST-IV

AP 1 x 600 2017-18

2 Dr. NTTPS, Vijayawada

AP 1 x 800 2017-18

3 Krishnapatanam Stage II (U3)

AP 1 x 800

4 Polaki AP 4000 (5 x 800 MW)

5 Edlapur KAR 1 x 800

6 North Chennai Stage III TN 1 x 800 2019-20

7 North Chennai Stage IV

TN 2 x 800 Beyond 2019-20

8 Ennore TPS Exp TN 1 x 660 2018

9 Ennore replacement TN 1 x 660 2018

10 Udangudi Stage I TN 2 x 660 2019-20

11 Uppur TPP (TBCB) TN 2 x 800 2019-20

12 Manuguru PPP Telangana 4 x 270 U1 : 20.03.2017 U2: 20.05.2017 U3: 20.09.2017 U4:20.09.2017

13 Kakatiya TPP Stage III Telangana 1 x 800 2017-18

14 Kothagudem TPS Phase VII

Telangana 1 x 800

15 Damaracherla (Yadadri)

Telangana 5 x 800 2018-19

Updated status of new projects of IPPs is furnished below:

Sl No.

Name of project Located in

Capacity in MW

Commissioning Schedule /Remarks

1 Meenakshi PH-II AP 2 x 350 2017-18 Untied: 640 MW

2 East Coast Energy Thermal

AP 2 x 660

2017-18 AP : 300 MW

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3 Thermal Powertech (TPCIL) Unit-III

AP 1 x 660

2017-18

5 Godhna TPP, Janjir – Champa Dist, Chhattisgarh

For KAR 2 x 800 2017-18

16.2 SRPC stated that declaration of COD letter from SLDC was required to be submitted to CEA, Fuel

Management Division for purpose of coal linkages etc.

16.3 SRLDC pointed out those new ISTS connected units should come out with detailed metering

scheme for various units commissioning schedule at least one year prior to synchronization.

The scheme needed to be discussed and finalized in the Meeting of Commercial Sub

Committee.

17 LGBR & OUTAGE PLANNING

17.1 Status Review on development of load forecasting tools by SLDCs as per IEGC Clause

5.4.2

17.1.1 The issue was noted for compliance by the states/SLDCs.

17.1.2 The following was noted from the Order dated 19.12.2013 on Petition No. 249/250/251/MP/2012

“We direct all STUs/SLDCs of the Northern Region, Southern Region and Eastern Region to

forecast their demand and make adequate arrangements to avoid dependence on

Unscheduled Interchange for meeting their demand or for injecting short term surplus power,

irrespective of the frequency”

17.1.3 There was need for further involvement of DISCOMs for their 96 block load forecast and by

state generators of their 96 block generation forecast. SLDCs needed to play more

proactive role in this regard.

17.1.4 Outage deviation report for the period April 2017 – September 2017 in respect of Generating

Units/Transmission Elements of Southern Region need to be submitted by all the

constituents which is to be communicated to Hon’ble CERC.

18 OTHER ISSUES

18.1 Collection of data regarding Power Supply to Rural Areas

18.1.1 In the Meeting held at MoP on 09.04.2014 it had been decided to collect the data invariably

from DISCOMs. It is requested that the data in this regard in the required format may please

be arranged to be communicated to SRPC Secretariat at the following E-mail addresses:

msssrpc-kar@nic.in/seoprnsrpc@kar.nic.in

18.1.2 Data to be communicated by first week of the month for previous month.

18.2 Reporting the Status of implementation of the recommendations of the Enquiry Committee

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18.3 All RPCs had been requested to update and forward the status of implementation of

recommendations of the Enquiry Committee on Grid Disturbances on 30th and 31st July 2012

to CEA in the prescribed format on fortnightly basis regularly i.e. the status as on last day of

the month to be forwarded by the 3rd day of the following month, and that as on 15th of the

month to be forwarded by 17th of the month. All the constituents were requested to furnish

timely status updates.

18.4 Energy Generation data Management from Renewable Energy Sources Monthly generation data in respect of Renewable Energy Sources was to be submitted to

CEA with a copy to SRPC.

Information furnished by states as on 30.10.2017 is at Annexure-18A

18.5 Power supply hours in various States/UTs (Rural and Urban areas) for Replying to Parliament Questions: CEA Requirement Power supply hours to Rural and Urban areas of states/UTs (Rural and Urban category wise is

to be furnished SRPC Secretariat.

18.6 Wind Generation

SRLDC presented the day-wise Wind Generation pattern in Karnataka & Tamil Nadu during

the period 1st September 2017 to 30th September 2017. Wind generation in Tamil Nadu had

varied between 69.502 MU (19.09.2017) to 4.166 MU (12.09.2017). Wind generation in

Karnataka had varied between 44.988 MU (19.09.2017) to 3.302 MU (08.09.2017)

(Annexure-18B).

18.7 Generators were requested to take steps to maintain the coal stock position.

19 Vote of Thanks

MS, SRPC thanked the participants for their active participation in the Meeting.

20 Date &Venue of the next Meeting

The schedule for the next OCC Meeting is as follows:

Meeting : 137th OCC of SRPC

Date : 10.11.2017 ( Friday)

Time : 10:00 Hours

Venue : MAPS, Kalpakkam

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