Post on 27-Mar-2020
Power Grid Corporation Of India Ltd.
Welcomes
Delegates
fromfrom
South Asia & USEA
To
Northern Regional Load Dispatch CenterNew DelhiNew Delhi
Presentation OutlinePresentation Outline• Overview of Indian Power System• Grid Operation• Grid Operation• Power System In Extremes• Indian Electricity MarketIndian Electricity Market
– Availability Based Tariff (ABT) & Unscheduled Interchange (UI)Sh T O A (STOA)– Short Term Open Access (STOA)
– Metering and Settlement System
• International Interconnections• International Interconnections• IEGC
19-July-2007 POWERGRID - NRLDC 2
Overview of Indian Power Systemy
Spatial Distribution
Of Load
Source:
Powerline
(Siemens
19-July-2007 POWERGRID - NRLDC 4
(Siemens Ad),
Oct-2006
Energy Resource Map Of India
Jammu
Hydro• Hydro potential in North
east and upper part of
NRPartabpur
RAPP
SIKKIMNEPAL
BHUTANDelhi
Guwahati
Ludhiana
J i
east and upper part ofNorthern Region
• Coal reserves mainly in
WR
ERNER
Talcher/Ib Valley
Vindhyachal
Korba
RAPP
MYA
NMM
AR
CHICKEN NECK
DESHBANGLA
Pipavav
Kolkata
PatnaLucknow
Bhopal
GuwahatiJaipur
Gandhinagar
Indore
Eastern Region
• Distribution of energy resources and consumption
SR
LEGEND
Coal
VizagSimhadri
Kaiga
Tarapur
Krishnapatnam
Generation Load-Centre
Bhubaneswar
Mumbai
Raipur
Hyderabad
Coalresources and consumption centres are extremely unbalanced
Ennore
KudankulamKayamkulam
Hydro
Lignite
Coastal
Nuclear
Kaiga
Mangalore
p
Cuddalore
South MadrasChennai
Bangalore
Thiruvananthapuram
Kozhikode • Necessitate power transfer over long distances
19-July-2007 POWERGRID - NRLDC 5
NuclearSRI LANKA
COLOMBO
680 720 760 880 920 960800 84 082.5 0
J&KDi it J&K
HPPUNJAB
HARIANA
Diversity
• Time NN
EE
NE
B’DESH
NEPAL BHUTANHARIANA
RAJASTHAN UP BIHARASSAM
MNPMIZTRP
NG
MEMYANMAR
SKMDELHI
NER NER • Time
• Generation Resources
W W DESH-MP
ORISSA
WBL
GUJARAT
MAHARASHTRA
MIZTRP
DIUDAMAN
JKND
CTGR
Resources
• Load Centers
L H l f S S
KARNATAKAAP
A&N
PONDICHERYGOA
• Long Haulage of Power
• WeatherTAMILNADULAKSHADWEEP
A&N• Weather
• Seasons
19-July-2007 POWERGRID - NRLDC 6
SRI
LANKA
Indian Scenario: Regional GridsIndian Scenario: Regional GridsInter regional Link
MW capacityTwo synchronous systems-North-Central (New) Grid
30,500 MW
NER-ER 1,240
ER-NR 4,220
( )& Southern Grid
36,437 MW
16,00039,749 MW
ER-SR 3,120
ER-WR 1,76017,159 MW
2,506 MW
39,749 MW
SR-WR 1,680
WR-NR 2,080
38,144 MWTotal as on date
14,100
T t f 37 700
Installed Generation CapacityCurrent : 134,077 MWT t f Y 2012 200 000 MW
19-July-2007 POWERGRID - NRLDC 7
Target for 2012
37,700Target for Year 2012 : 200,000 MW
Figures as on 31-May-2007
EHV Infrastructure (as on 31st May 2007)
TRANSMISSION
OWNERSHIP TOTAL
(as on 31st May 2007)
SION VOLTAGE
CENTRAL STATE
Circuit Kilometer
765 kV charged at 400 kV
1863 409 2272
400 kV 52786 24998 77784400 kV 52786 24998 77784
220 kV 9466 105970 115436
+ 500 kVHVDC
4368 1504 5872
T l 68483 132881 201364
19-July-2007 POWERGRID - NRLDC 8
Total 68483 132881 201364
‘ELECTRICAL’
REGIONS
NORTHERN REGION
NORTH-EASTERN REGION
1
WESTERNREGION
EASTERN REGION
2SOUTHERN REGION
2
WITH THE COMMISSIONING OF THE TALA PROJECT CONNECTING THE EASTERN AND NORTHERN GRIDS, INDIA NOW HAS ONLY TWO GRIDS
Peculiarities of Regional Grids in India
REGIONAL GRIDS
Deficit Region
Snow fed – run-of –the –river hydro
Highly weather sensitive load
NORTHERN REGION NORTH
GRIDS g y
Adverse weather conditions: Fog & Dust Storm
Very low load
CHICKEN-NECK
WESTERNREGION
EASTERN REGION
REGION NORTH-EASTERN REGION High hydro potential
Evacuation problems
Low load
SOUTHERN REGION
REGION Low load
High coal reserves
Pit head base load plants
Industrial load
High load
19-July-2007 POWERGRID - NRLDC 10
Monsoon dependent hydro
765 KV400 KV400 KV500 KV HVDC
19-July-2007 POWERGRID - NRLDC 11
Typical Load CurveAll I diAll India (Oct-2006)
19-July-2007 POWERGRID - NRLDC 12
19-July-2007 POWERGRID - NRLDC 13
Grid Operationp
HIERARCHY OF GRID MANAGEMENTMANAGEMENT
National Level
Regional LevelRegional Level
State Utilities Level
INTER STATE GRID
CS - 1 IPPCS - 2
Regional GridRLDCCoordinates
Trader
State - A State - C
Control Areas CS: Central SectorState - B
INTRA STATE GRID
STATE IPP
CENTRALSTATE GENR.IPP SHAREGENR.
SEB’s GridSLDCCoordinatesDirects
Discom - A Discom - C
Discom - BConsumer
Information Flow hierarchyNLDCNational
LevelUnified Load Despatch & data
y
RLDC5 Nos.Region Level
Despatch & data acquisition
SLDC23 Nos.
State HQ Level
SUB LDC51
Group of District Level
RTU
Nos.
1160 Nos.Plant/Sub
Station Level
19-July-2007 POWERGRID - NRLDC 18
Level
REAL TIME GRID OPERATION
REAL TIME OPERATION
I di El t i it A t
IEGC ABT
• REAL TIME OPERATION STANDS ON TWO FIRM FOOTINGSIEGC THE INDIAN ELECTRICITY GRID CODE
Indian Electricity Act
19-July-2007 POWERGRID - NRLDC 19
– IEGC – THE INDIAN ELECTRICITY GRID CODE– ABT – AVAILABILITY BASED TARIFF
GRID OPERATION:A TIGHT ROPE WALKA TIGHT ROPE WALK
19-July-2007 POWERGRID - NRLDC 20
DELHI LOAD VARIATION LAST WINTERCOLOUR CODE
High demandHigh demand
Z AXISZ-AXIS:
DEMAND MET
IN MWMorning k
Y-AXIS:
DATES IN JAN 05
Lo demand
peak
Day off peak
Evening peak
X-AXIS: TIME IN 5 MIN BLOCKS
Low demand
Night off peak
19-July-2007 POWERGRID - NRLDC 21
Severe morning peak is due to heating load
Operation Of Very Large P G idPower Grid
• “Large grid” comprising of NER ERLarge grid comprising of NER, ER, WR & NR
• Over 250 power stations• Over 250 power stations
• Total installed generation capacity of 88 000 MW88,000 MW
• Operating size of 60,000 MW
• Cover 80% of the country’s area
• Cater to 78 % of country’s population
19-July-2007 POWERGRID - NRLDC 22
Cater to 78 % of country s population
Challenges of interconnectionChallenges of interconnection
“…one can export bl ll“there is a vast trouble as well as
help. In fact, it is only by sharing the troubles that
there is a vast amount of information to be gathered and
h d d d the troubles that help is possible…”
comprehended, and a diversity of operating practices that must be coordinated and made compatible…”
Charles Concordia
19-July-2007 POWERGRID - NRLDC 23
Charles Concordia1908-2003
Utilization of Time DiversityUtilization of Time DiversityReversal of Flow
On AC InterconnectorOn AC Interconnector Between
North & Central GridsDuring Evening Peak
NORTH-EASTERN REGION
Ch i Fl
WESTERNREGION
REGION
EASTERN REGION
AT 1830 HRS
600 MW
Changing FlowBetween Eastern
And WesternRegions During
NORTH-EASTERN REGION1200 MW
19-July-2007 POWERGRID - NRLDC 24
Regions During Peak Hours
WESTERNREGION
EASTERN REGION
AT 2000 HRS
Optimal Utilization of Resources
22000
3480037752
31000
25000
30000
35000
40000
Growth In
p
814510850
13000
5000
10000
15000
20000
25000 Growth In Inter Regional Exchanges
(MUs)
0
5000
00-01 01-02 02-03 03-04 04-05 05-06 06-07
100
707580859095
100
Increased PLF
5055606570
'01-02 '02-03 '03-04 '04-05 '05-06 '06-07
19-July-2007 POWERGRID - NRLDC 25
01 02 02 03 03 04 04 05 05 06 06 07
Central Sector All India
InitiativesInitiatives• Stakeholder sensitization
– Operator training, Agenda in Regional Power Committee meetings
N i li ti t l d l d & h d ith SLDC• New visualization tools developed & shared with SLDCs– Geographical maps– Zones & flow-gates diagram
Power flow on major flow gates– Power flow on major flow gates– Angular separation
• Developed logistics for instant information dissemination– Website – www nrldc org– Website – www.nrldc.org– Short Messaging Service (SMS)– Flasher on NRLDC website homepage
• Night shift reinforcementNight shift reinforcement – Regular Duty Roster – 12 to 15 additional executives from Grid Management, SCADA/IT,
Technical Services, Commercial & Human Resource on SOS call
19-July-2007 POWERGRID - NRLDC 26
Situational AwarenessSituational Awareness
• Situational awareness– A mental model of our operating environment and our place
in it
– Consists of four processesConsists of four processes• Perception
• Comprehension
• Projection• Projection
• Prediction
19-July-2007 POWERGRID - NRLDC 27
Courtesy: PJM
System Security & StabilitySystem Security & Stability
• Decentralized Operation & Controlp• Unity of Command
– Regional Load Despatch apex body at the regional level
– State Load Despatch Centre apex body in the state
• Relay Coordination at Regional level– Under frequency, df/dt relays, under voltage relays
• Parallel operation of Long HVDC & EHV AC systemU f D i C ti FACTS SVC
19-July-2007 POWERGRID - NRLDC 28
• Use of Dynamic Compensation: FACTS, SVC
System Security & StabilitySystem Security & Stability
• Frequency Controller on HVDC Back to BackFrequency Controller on HVDC Back to Back
• Using Advanced tools of System Visualization– SCADA, EMS, Unified Network DatabaseSCADA, EMS, Unified Network Database
• Real-time Balancing by operator complemented byp y– Frequency linked Pricing for Active Power
imbalance
– Voltage linked Pricing for Reactive Power imbalance
19-July-2007 POWERGRID - NRLDC 29
Reliability of SupplyReliability of Supply
• Ensuring network adequacy at the EHV levelg q y– Maintaining redundancy in the network– Integrated Resource Planning– Regular feedback to system planners due to TSO structureg y p
• Ensuring EHV system availability– Prudent Operation and Maintenance practices
Thermo vision Scanning– Thermo vision Scanning– Hotline Maintenance
• Deployment of Emergency Restoration System• Asynchronous Inter-regional links • Coordination between utilities for all operational
issues
19-July-2007 POWERGRID - NRLDC 30
– Planned Generation/Transmission Outage Scheduling
Economy and EfficiencyEconomy and Efficiency
• Decentralized Resource SchedulingDecentralized Resource Scheduling
• Frequency Linked Balancing Mechanism
• Scientific Metering and Settlement SystemScientific Metering and Settlement System
• Open Access in Interstate Transmission SystemSystem
• Promoting Competition in the Sector
• Transparency• Transparency
19-July-2007 POWERGRID - NRLDC 31
Power System In ExtremesPower System In Extremes
MODES OF OPERATION
NORMAL
MODES OF OPERATION
NORMAL
A L E R TRESTORATIVE
EMERGENCY19-July-2007 POWERGRID - NRLDC 33
EMERGENCY
PROBLEMS IN GRID OPERATIONSPROBLEMS IN GRID OPERATIONS
UNIT FAILURE
INSUFFICIENTGENERATION
LOSS OFGENERATION
TRANSFORMER/LOSS OF
BUSTRANSFORMER/LINE FAILURE
LOADBUS ISOLATED
SYSTEM SYSTEM COLLAPSCOLLAPS
EEREDUCEDNETWORK
REDUNDANCY
LINE OVERLOADOR
UNSATISFACTORY
EE
19-July-2007 POWERGRID - NRLDC 34
BUS VOLTAGE ISLANDING
TYPICAL LOAD CRASH IN NORTHERN REGIONLoad Crash In Northern Region 09-10 June 2005
22000
24000
51.0
51.5
FREQUENCY
20000
22000
50.5
16000
18000MW
49.5
50.0
Hz.
14000
16000
48.5
49.0LOAD
VARIATION IN LOAD: 22762 TO 14907VARIATION IN FREQ: 51.35 TO 48.58Variation In Load: 22762 Tto 14907
12000
0:00 3:00 6:00 9:00
12:00
15:0018:00
21:00
0:00 3:00 6:00 9:00
12:0015:00
18:00
21:00
48.0Variation In Freq: 51.35 To 48.58
19-July-2007 POWERGRID - NRLDC 35
TIME FOR 09/10 JUNE 2005
Tsunami Of Trippings Number of line faults/trippings on 22nd/23rd Dec 2005 night in
Northern Region180
167
120140160180
Cumulative trippingsCumulative restoration
11880
100120 Net lines out
49204060
0
2300 00100
02000300
04000500
06000700
19-July-2007 POWERGRID - NRLDC 36
23 01 02 03 04 05 06 07
Foggy ZoneFoggy Zone
19-July-2007 POWERGRID - NRLDC 37
Earthquake – 08th Oct 2005 (0920 Hrs)• Magnitude 7 3Magnitude 7.3• Load throw off – 1500 MW approx
• Kashmir Valley collapse Gladni (Jammu) ICTs tripped Tertiary short curcuit• Gladni (Jammu) ICTs tripped – Tertiary short curcuit
• Wagoora ICT –1• 400/220 KV 315 MVA XFMR at Ratangarh tripped - Bucholz
• Generation Loss 500 MW approx (Turbine vibration)• Generation Loss – 500 MW approx (Turbine vibration)• Shanan Power House – Bassi generation backed down• Suratgarh #5 – 250 MW• Ropar #1 – 210 MW• Ropar #1 – 210 MW
• Line Trippings – on over voltage• 400 KV Baspa-SJVNL – II• 400 KV Chamera 1 Chamera 2• 400 KV Chamera 1 – Chamera 2 • 400 KV Chamera 1- Jullundher D/C• 400 KV Jullundher – Moga - II• 220 KV Salal – Kishenpur – IV
19-July-2007 POWERGRID - NRLDC 38
220 KV Salal Kishenpur IV
• System normalized by 1300 hrs
REGIONAL LOAD AND FREQ FOR 8-OCTOBER-2005
25000 53.00
NR LOAD FREQ
21000
23000
52.00
52.50
17000
19000
51.00
51.50
13000
15000MW
50.00
50.50
11000
13000
49.50
50.00
7000
9000
48.50
49.00
19-July-2007 POWERGRID - NRLDC 39
50000 1 2 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
TIME
48.00
ZOOM SCROLL
Generators trippingTripping in DTL system on Independence day
Generators tripping
Sl Station No. of Sl kV N Of
Line trippings
No. Name Tripping
1 Rajghat #2 3
2 IP Pos #2 2
Sl
No
kV
Level
No. Of Tripping
2 IP Pos #2 2
3 IP Ext GT3 2
4 IP Ext GT4 2
.
1 220 131
2 66 113 4 IP Ext GT4 2
5 IP Ext GT5 2
6 IP Ext GT6 2
2 66 113
3 33 2266 IP Ext GT6 2
7 IP Ext ST2 2
8 1 3
4 TOTAL 460
19-July-2007 POWERGRID - NRLDC 40
8 Pragati 1 3
Hourly Tripping Frequency on 15th Aug 2006Trippings in DTL system
4650
4644
35
40
45
220 kV 66kV 33kV
20
232220
25
30
35
of T
rippi
ng
12 12
15
9
13
20
8
13
77 7
13
7 7
18
7
20
7
10
16
79 8
11
10
15
20
No.
o
3 3
68 76 7
4
7 7
13
7 7
4
7 75 6
3
8
0
5
10
0800 0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
19-July-2007 POWERGRID - NRLDC 41
0800 0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000Time(Hrs)
Indian Electricity Markety
Development of the Power M k i I diMarket in India
• Development of the Power Market p– Section 66, IE Act 2003
– National Electricity Policy, 12-Feb-2005, Para 5.7.1(d)
I l t ti f I t St t ABT 2002 03• Implementation of Inter-State ABT : 2002-03– Metering, Scheduling and Settlement
• Introduction of Open Access in Inter StateIntroduction of Open Access in Inter State Transmission : May 2004
• Development of PX– Staff paper by CERC : July 2006
– Public hearing : December 2006
– Guidelines for setting up PX : February 2007
19-July-2007 POWERGRID - NRLDC 43
g p y
– Proposal for setting up PX : MCX, March 2007
Regional Electricity Market in India
Long term contracts
Daily off take
Buyer SellerShort term Contract
TSOPhysical delivery
Physical Off takeDaily Delivery Commitment
Daily off‐take commitment Grid
Physical delivery
Pool AccountTransmission Charges
Capacity addition
Buyer SellerWeekly settlement
Operated by
System Operator
UI UI
System Operator
Availability & Energy Charges
RetailLenders& Owners
19-July-2007 POWERGRID - NRLDC 44
Retail Consumers
& Owners
Availability Based Tariff (ABT) & U h d l d I t h (UI)Unscheduled Interchange (UI)
Commercial Mechanism
ABC of ABTABC of ABT
• ABT is a scientific settlement system forABT is a scientific settlement system for contracted sale & purchase of power
• Has three components• Has three components– Fixed Charges or capacity charge
Li k d t d h d d l d• Linked to day-ahead declared availability/subscription
– Variable Charges or fuel chargesVariable Charges or fuel charges• Linked to before the fact energy schedules
– Charges for deviation from commitments
19-July-2007 POWERGRID - NRLDC 46
Charges for deviation from commitments
ABC of ABTABC of ABT
• Frequency actuated signal– Signal transmitted at the speed of dynamics to be
controlled– Quasi-steady state assumption not valid– Quasi-steady state assumption not valid
• Real time pricing stretched to its physical limits– Merit order– Economic load management
• Incentives for helping the grid• Opportunities for a diligent player• Simple, dispute-free weekly settlement system
19-July-2007 POWERGRID - NRLDC 47
DECENTRALIZED SCHEDULING
TimeAvailabilityDeclaration
Entitlements
10:00
11:00
Time
Entitlements
S
Requisition &Bilateral Agreements
I j i S h d l
11:00
15:00
RI LDC
Injection Schedule Drawal Schedule
Revision in DC Revision in Requisition
17:00
22:00
RLDC
ISGS
FinalInjection Schedule
FinalDrawal Schedule
23:00
S
19-July-2007 POWERGRID - NRLDC 48
Revisions duringCurrent day
Revisions duringCurrent day
0 to 24 hours
Balancing market guiding vectorU h d l d I h (UI) RUnscheduled Interchange (UI) Rate
applicable only for deviations from contract in real-time
745800NORMAL OPERATING BAND SPECIFIED BY IEGC
600
700
WH
)
Deficit condition in the grid
Signal to serve more
consumers if possible
NORMAL OPERATING BAND SPECIFIED BY IEGC
345
300
400
500
(Pai
se/K
W else save fuel
by reducing generation
Signal to use all available
150
210
100
200
300
Rat
e (
Surplus condition in the grid
use a ll available generating resources
Elsereduce energy consumption
0 00
100
48.5 49.0 49.5 50.0 50.5 51.0
the grid
19-July-2007 POWERGRID - NRLDC 49
Frequency (Hz) UI Rate wef 30th April 2007
Improvement in Frequency Profile
19-July-2007 POWERGRID - NRLDC 50
UI mechanismUI mechanism• Maximizes social welfare• Transparent, neutral & rigging proof• Diffuses market power • Ultimate open access• Facilitates reforms in the sector
E t d d bil t l h• Encourages trade and bilateral exchanges• Facilitates arbitrage with other regional power
poolspools• Offers alternative tariff mechanism for
independent power producers and merchant
19-July-2007 POWERGRID - NRLDC 51
p p pplants
ADVANTAGES ABT & UIADVANTAGES ABT & UI
• Inculcates self discipline among participantsInculcates self discipline among participants– Incentives to those who help the grid
– Disincentives to those who harm the gridg
• Is scientific commercial mechanism
• Brings in economy and efficiencyg y y
• Achieves natural merit order in generation
• Conducive for competition in power sectorConducive for competition in power sector
• Provides platform for power market to flourish
19-July-2007 POWERGRID - NRLDC 52
The End Result ….The End Result ….• Frequency is
– collectively controlledy– democratically stabilized
• Wholesale market is workably competitive – allocative efficiency– productive efficiency
• Economic signal available for• Economic signal available for – optimum utilization of resource – investments in generation capacityg p y
• Settlement is– streamlined
19-July-2007 POWERGRID - NRLDC 53
– dispute-free
Short Term Open Accessp
OPEN ACCESS IN INTER-STATE TRANSMISSIONTRANSMISSION
• Implemented w.e.f. 6-May-2004• Products –
– Long term Access– Short term Access
• MonthlyAd– Advance
– First Come First Serve• Day ahead • Intra day transactions
• Permits usage of spare transmission capacity through a transparent process
• Offers choice and freedom to buy & sell powery p• Provides signals for investment in transmission
19-July-2007 POWERGRID - NRLDC 55
Time Line For Open AccessTime Line For Open Access
Current MonthDay of
OperationS h d li &
19 25
M1 M2 M3
Scheduling & Accounting
AdvanceR ti U t 3
One Day Before Operation
Days
Reservation Upto 3 – Months
Approvals For Advance
First Come First Serve
Day – Ahead
19-July-2007 POWERGRID - NRLDC 56
Advance Reservation Intra - Day
Metering and Settlement Systemg y
Metering System
Meter Locations No. of Meters
North 181 1002
East 88 338
West 74 390West 74 390
Southern 80 441
North East 54 191
All India 477 2362
19-July-2007 POWERGRID - NRLDC 58
All India 477 2362
Utilities1 GRIDCO 24 LOKTAK 47 MPPTCL2 KSEB 25 BPSL 48 APPCC3 DVC 26 KAWAS 49 J&K4 KPCL 27 MIZORAM 50 UPCL5 MALANA 28 MSEDCL 51 RVVNL5 MALANA 28 MSEDCL 51 RVVNL6 RSTPS 29 CSEB 52 RST7 TRIPURA 30 MSETCL 53 PTC8 BHUSHAN 31 UPPCL 54 NVVNL9 JDVNL 32 MPSEB 55 AEL9 JDVNL 32 MPSEB 55 AEL
10 BSEB 33 UTC 56 TATA11 NBFAL 34 GOA 57 RETL12 JTPCL 35 APTRANSCO 58 LANCO13 SIKKIM 36 PSEB 59 JSWEL14 ARUNACHAL 37 HPGCL 60 JSWPTCL15 DADRI GAS 38 DTL 61 SKPCL16 KAYAMKULAM 39 GUVNL 62 GEL17 BSES 40 TNEB 63 NPCL(UP)18 AURAIYA 41 WBSEB 64 GSML19 KPTCL 42 TATA 65 NHPC20 NBVL 43 MPSEB 66 OHPC21 ANTA 44 CESC 67 HPC22 RGCCPP 45 SAIL 68 USML
19-July-2007 POWERGRID - NRLDC 59
22 RGCCPP 45 SAIL 68 USML23 NAGALAND 46 HPSEB 69 RPPCC
Time Line For SettlementTime Line For Settlement
Settlement weekThree day grace periodFor Bank processing
0.04 % per day interest on defaulters
Mon
day
0000
unda
y 24
00 esda
y24
00 day
0 day
0 esda
y24
00esda
y24
00
rida
y 24
00
onda
y 24
00
M Su 2
Tu 2
Meter Data download & receipt at RLDC & preliminary checks
Thu
rs12
00
Satu
rd
2400 Tu 2
Tu 2 Fr 2
Disbursement to utilities from the pool account
Mo 2
Data validation, processing and computation at RLDC. Forwarded to Regional Power Committee Secretariat Account
Settled within 21 days
Data cross checking by Regional Power Committee Secretariat & Issue of Pool Account
Unscheduled Interchange Account Reactive Energy Account
Payment by utilities to the pool account managed by System Operator (RLDC)
19-July-2007 POWERGRID - NRLDC 60
International Interconnections
India – Bhutan Interconnection
SIKKIM BHUTAN KanglungTangmachu
Chukha HEP (4x84 MW), Bhutanconnected with Indian system
Kuruchhu HEP (4x15 MW) of
SIKKIM U Kanglung
Tintibi(336MW)
ChukhaKilikhar
(60MW)Kuruchhu
Pemagh
Tala HEP
KV)
(1020MW)
Kuruchhu HEP (4x15 MW) ofBhutan connected to IndianGrid (2
20 K
V)
Nganglam
Salakati Bornagar
Geylegphug(132 KV)
RangiaG
De
Siliguri (400
K
132kV Geylegphug -Salakati
Tala HEP(1020MW)
BongaigaonSiliguri
Dalkhola
Birpara
Agia
SalakatiDhaligaon Amingao
Guwahat
Rangia
interconnected with Indiangrid Aug’2006 BANGLADESH
GALST MEGHALAYA
19-July-2007 POWERGRID - NRLDC 62
India - Bhutan
Kurichu HEP (4x15 MW) of Bhutan already connected to Indian Grid through Kurichu – Geylegphug – Salakati 132 kV lineg y gp g
3 nos. of 33 kV links are also in service between India and Bhutan
Tala HEP 400kV level interconnection from Tala in Bhutan to Delhi in India for evacuation of power from Tala HEP(6x170MW)
More hydro projects envisaged to come up in BhutanMore hydro projects envisaged to come up in BhutanPunatsangechu - I : 1000 MWPunatsangechu - II: 1000 MWMangdechu : 600 MWMangdechu : 600 MWSankosh : 4060MW
19-July-2007 POWERGRID - NRLDC 63
India - Bhutan
Chukha HEP (4x84 MW) system in Bhutan, built with Indian technical and financial assistance -with Indian technical and financial assistance Chukha-Birpara 220kV 3 ckts.
S l f Ch kh HEP (336MW) i Bh t iSurplus power from Chukha HEP (336MW) in Bhutan is exported to India. – constitutes about 75% to 80% (1400 MU/year) of total power generatedMU/year) of total power generated.
Benefits to both the countries
Earning to Bhutan - Rs. 1400 million (US$ 31 million) annually
19-July-2007 POWERGRID - NRLDC 64
India have access to environment friendly hydro power
19-July-2007 POWERGRID - NRLDC 65
India – Nepal Grid Interconnection
Presently 16 links at 132/33/11 kV voltage level
Ab t 50 MW b i h dAbout 50 MW power being exchangedNet export to Nepal (about 10% of demand of Nepal metthrough imports from India)
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Supply of 70MU/annum from Tanakpur (India) to Nepal
India - NepalLimited Energy trade based on bilateral agreementsed e gy ade based o b a e a ag ee e s
Over 16 links at 132/33/11 kVAbout 50 MW of power being exchangedNet e port to Nepal (abo t 10% of demand of Nepal met thro gh imports fromNet export to Nepal (about 10% of demand of Nepal met through imports from
India)Supply of free power from Tanakpur (India) to Nepal – 70MU/annum
d l h i d d f i ddi i lIndo-Nepal Power Exchange Committee recommended for construction additional 132kV lines
Anandnagar (India) - Butwal (Nepal) Motihari (India) - Birganj Nepal Sitamarhi (India) – Dhalkebar (Nepal)
Large potential projects being considered for development and export of power toLarge potential projects being considered for development and export of power to India
West Seti HEP 750 MWArun HEP 685 MW
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Arun HEP 685 MWPancheshwar HEP 6,500 MW
Indian Electricity Grid CodeIndian Electricity Grid Code
IEGCIEGC
The IEGC brings together a single set of technical g g grules,encompassing all the Utilities connected to/or using the inter-State transmission system (ISTS) and provides the following:provides the following:– Documentation of the principles and procedures which
define the relationship between the various Users of the inter State transmission system (ISTS) as well as theinter-State transmission system (ISTS), as well as the Regional and State Load Dispatch Centers
– Facilitation of the operation, maintenance, development and planning of economic and reliable Regional Gridplanning of economic and reliable Regional Grid
– Facilitation for beneficial trading of electricity by defining a common basis of operation of the ISTS, applicable to all the the users of the ISTS
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the users of the ISTS
Chapter – 1: Generalp
1.1 Introduction1.2 Objective1.3 Scope1.4 Structure of the IEGC1.5 Non-Compliance
G f O1.6 Free Governor Mode of Operation1.7 Charge/payment for Reactive Energy Exchanges1 8 Exemptions1.8 Exemptions1.9 Glossary and Definitions
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Chapter – 2: Role of Various O i ti d Th i Li kOrganizations and Their Linkages
2.1 Introduction2.2 Role of RLDCs2.3 Role of RPCs22.4 Role of CTU2.5 Role of CEA
f S C2.6 Role of SLDCs2.7 Role of STUs
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Chapter – 3: Planning Code For Inter St t T i iState Transmission
3.1 Introduction3.2 Objective3.3 Scope3.4 Planning Policy3.5 Planning Criterion3.6 Planning Data3.7 Implementation of Transmission Plan
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Chapter – 4: Connection Conditionsp4.1 Introduction4.2 Objective4 3 Scope4.3 Scope4.4 Procedure for Connection4.5 Connection Agreement4.6 ISTS Parameter Variations4.7 Agency & CTU equipment at Connection Points4.8 Generating Units and Power Stations4.9 Reactive Power Compensation4.10 Data & Communication Facilities4.11 System Recording Instruments4.12 Responsibilities for Operational Safety4 13 Procedure for site access site operational activities and maintenance4.13 Procedure for site access, site operational activities and maintenance
standards4.14 International Connections to ISTS4.15 Schedule of Assets of Regional Grid
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gAnnexure : 1 Model Connection Agreement
Chapter – 5: Operating Code For R i l G idRegional Grids
5.1 Operating Policyp g y5.2 System Security Aspects5.3 Demand Estimation for Operational Purposes5.4 Demand Management5.5 Periodic Reports
O5.6 Operational Liaison5.7 Outage Planning5 8 Recovery Procedures5.8 Recovery Procedures5.9 Event Information
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Chapter – 6: Scheduling and Dispatch C dCode
6.1 Introduction6.2 Objective6.3 Scope6.4 Demarcation of Responsibilities6.5 Scheduling and Despatch procedures
C6.6 Reactive Power and Voltage ControlAnnexure 1 : Complementary Commercial Mechanism Annexure 2 : Regulatory Requirements of Special Energy g y q p gy
MetersAnnexure 3 : Payment for Reactive Energy Exchanges on
State- owned Lines
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Chapter – 7 & 8Chapter 7 & 8
• Chapter – 7: Inter – Regional ExchangesChapter 7: Inter Regional Exchanges
• Chapter – 8: Management of IEGC
I E G C
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DiscussionDiscussion