IMPACT OF ABT, NETWORK STRENGTHENING ON GRID OPERATION

IN KARNATAKA

SOUTHERN REGIONAL LOAD DESPATCH CENTRE

POWER GRID CORPORATION OF INDIA LIMITED

ADVANTAGE KARNATAKA

ADVANTAGE KARNATAKA• HARNESSING THE VAST HYDRO POTENTIAL

– EFFECTIVE USE OF HYDRO TO SECURE BEST PRICES– DEPLETED RESERVOIRS SPARINGLY USED– CONSERVATION FOR PEAK

• OPTIMAL RESOURCE UTILISATION– EXEMPLARY PERFORMANCE IN UI MARKET

– SCHEDULING FOR MAX RETURNS!

• GRID DISTURBANCES ARE A THING OF THE PAST

• VAST IMPROVEMENT IN GRID PARAMETERS

• LOSSES REDUCED

SHARAVATHY

UI SUMMARY

SCHEDULE

DISTURBANCES

BLR VOLTAGE

TECHNICAL LOSS

THE COST OF GENERATION AT SHARAVATHY IS LESS THAN 20 Ps /UNIT

AVERAGE SELLING UI RATE OF KARNATAKA IS 372 Ps/UNIT

PLANT OPERATORS AT SHARAVATHY THINK OF THE RESERVOIR LEVEL IN RUPEES

RATHER THAN IN FEET!!!

Rs. Rs.

Rs.

Rs.

Rs.

Rs.Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.

Rs.Rs.

OPTIMAL RESERVOIR UTILISATIONSHARAVATHY IN KARNATAKA

0

100

200

300

400

500

600

700

800

900

1000

0 2 4 6 8 10 12 14 16 18 20 22 0

HOURS ---->

GE

NE

RA

TIO

N IN

MW

---

>

48.80

49.00

49.20

49.40

49.60

49.80

50.00

50.20

50.40

FR

EQ

IN H

Z--

->

SHARAVATHI GENERATION – TYPICAL DAY

FREQ

MW

UI SUMMARY – 116 WKSFROM 01/JAN/03 TO 20/03/05)

STATE ---> AP KAR KER TN PON

Total Net UI in MUs exported(-) / Imported(+)

-4195 3868 1195 1069 -88

Total Net amount in Rs. Crores

Receivable(-) / Payable(+)

-859 718 206 311 -16

Average rate of UI in paise/unit

204 186 173 291 188

INTER-REGIONAL EXCHANGES DETAILS UPTO 116 WKS (Till 20-MAR-05)

WR ER

Net Energy Transaction

112 MU

IMPORT BY SR

725 MU

IMPORT BY SR

Amount Due to

SR Constituents

Rs. 40.54 Cr. Rs. 3.94 Cr.

Amount Credited TO SR Constituents

Rs. 40.54 Cr. Rs. 3.94 Cr.

WR ER

Net Energy Transaction

82 MU

IMPORT BY SR

707 MU

IMPORT BY SR

Amount Due to

SR Constituents

Rs. 36.07 Cr. Rs. 2.36 Cr.

Amount Credited TO SR

Constituents

Rs. 36.07 Cr. Rs. 2.36 Cr.

INTER-REGIONAL EXCHANGES DETAILS UPTO 105 WKS (Till 26.12.04)

OD UD AND UI RATES OF CONSTITUENTS

247

186 178

247205

372

260

146

0

50

100

150

200

250

300

350

400

450

500

AP KAR KER TN

RA

TE (P

AIS

E/U

NIT

)

OVER DRAWAL (PURCHASE) UNDER DRAWAL (SOLD)

52 MU

4247 MU

6 MU

3874 MU

1276 MU

82 MU

1536 MU

467 MU

0

500

1000

1500

2000

2500

00:1

5

01:1

5

02:1

5

03:1

5

04:1

5

05:1

5

06:1

5

07:1

5

08:1

5

09:1

5

10:1

5

11:1

5

12:1

5

13:1

5

14:1

5

15:1

5

16:1

5

17:1

5

18:1

5

19:1

5

20:1

5

21:1

5

22:1

5

23:1

5

TIME --->

DC

, SC

HE

DU

LE

& A

CT

UA

L (

MW

)

49.0

49.5

50.0

50.5

51.0

51.5

FR

EQ

UE

NC

Y IN

HZ

---

>

Entitlement Schedule Actual Frequency

Schedule Vs Actual Drawal by KAR

Entitlement ά

Capacity Charges

Schedule ά

Energy Charges

Actual Drawal

Frequency

U I

0

1

2

3

4

5

6

7

8

9

10N

UM

BE

R O

F D

IST

UR

BA

NC

ES

---

----

->

1994

-95

1995

-96

1996

-97

1997

-98

1998

-99

1999

-00

2000

-01

2001

-02

2002

-03

2003

-04

2004

-05

YEAR ->

MAJOR MINOR

NO DISTURBANCES DESPITE LOSING ENTIRE SUPER GENERATING PLANTS LIKE

RAMAGUNDAM,VIJAYAWADA,KOTHAGUDEM, NORTH CHENNAI, SHARAVATHY ETC

MAJOR AND MINOR DISTURBANCES SINCE 1994

320

330

340

350

360

370

380

390

400

410

42000

:05

01:0

5

02:0

5

03:0

5

04:0

5

05:0

5

06:0

5

07:0

5

08:0

5

09:0

5

10:0

5

11:0

5

12:0

5

13:0

5

14:0

5

15:0

5

16:0

5

17:0

5

18:0

5

19:0

5

20:0

5

21:0

5

22:0

5

23:0

5

TIME IN HRS --->

VO

LT

AG

E IN

KV

---

>

REALITY BITE:

FARMERS IN KARNATAKA ARE HAPPY WITH FEWER HOURS OF QUALITY POWER!!.

EFFICIENCY OF PUMPS AT TG HALLI WATER WORKS IMPROVED!

COMPARISION OF BANGALORE VOLTAGE-TYPICAL DAY

BETTER VOLTAGE PROFILE MEANS LESS ELECTRICAL LOSSES

WATER SUPPLY TO BANGALORE

LOW VOLTAGE PROBLEMS AROUND BANGALORE HAMPERED WATER SUPPLY EARLIER

WITH BETTER VOLTAGE NOW, PUMPING EFFICIENCY HAS IMPROVED

400 KV STATION AT MYSORE BEING COMMISSIONED ON WAR FOOTING TO FURTHER FORTIFY THIS PART OF THE GRID

PUMPING LOSSES REDUCED

ENORMOUS SAVINGS TO THE STATE

MOTOR BURNING AND MAINTENANCE COSTS ALSO CAME DOWN DRASTICALLY

Technical Losses w.r.t. Voltage

• Power (P)= Voltage * Current = V*I• Losses = (Current)2 * Resistance = I2*R• Power is proportional to current, voltage remaining

constant.• To draw the same power at low voltage, one has to draw

more currente.g.; 100 MW = 400kV * 250 Amps 100 MW = 320kV * 312 AmpsLosses increases by 55% for 20%reduction in voltage. Losses doubles for about 30% reduction in voltage.

e.g. Loss reduction in SR by 1% has given an annual saving of about Rs 290 crores

SOUTHERN REGION LOSS*

 2002 2003 2004** 2005**

 

LOAD (MW)

LOSS (MW)

LOSS %

LOAD (MW)

LOSS (MW)

LOSS %

LOAD (MW)

LOSS (MW)

LOSS %

LOAD (MW)

LOSS (MW)

LOSS %

AP 6510 408 6.27 5983 264 4.41 7234 311 4.30 7557 279 3.69

KARNATAKA 4078 265 6.50 4609 237 5.14 5158 228 4.42 5285 183 3.46

KERALA 1928 82 4.25 2227 101 4.54 2479 86 3.47 2453 66 2.69

TAMILNADU 6135 224 3.65 6888 240 3.48 7421 198 2.67 7522 216 2.87

PONDICHERRY                   215 0 0.00

CENTRAL GENERATING STATION 472 0 0.00 684 0 0.00 538   0.00 121 0 0.00

SOUTHERN REGION 19123 979 5.12 20391 842 4.13 22830 823 3.60

23153 744 3.21

•*Source : Report of System Studies conducted for Accessing Shunt Compensation requirement in Southern Region – March 2004 and March 2005 - SREB ,CEA

•** Projected figures