1 SOUTHERN REGIONAL LOAD DESPATCH CENTRE POWER GRID CORPORATION OF INDIA LIMITED WELCOME TO V MADHU, MD, KPTCL

2 PRESENTATION OVERVIEW  SR GRID - QUICK FACTS SR GRID - QUICK FACTS  KPTCL METERING LOCATIONSKPTCL METERING LOCATIONS  AVAILABILITY BASED TARIFFAVAILABILITY BASED TARIFF  OPEN ACCESS REGULATIONS – RECENT CHANGESOPEN ACCESS REGULATIONS – RECENT CHANGES  IMPACT OF CHANGES – CASE STUDIES IMPACT OF CHANGES – CASE STUDIES  STATE SECTOR – CHALLENGES & TASKS AHEAD STATE SECTOR – CHALLENGES & TASKS AHEAD

3 MORE LINKS  SCHEDULING PROCEEDURE SCHEDULING PROCEEDURE  DRAFT IEGC JUNE 2005DRAFT IEGC JUNE 2005

4 THANK YOU

5 SOUTHERN REGIONAL GRID QUICK FACTS

6 SOUTHERN REGION WESTERN REGION EASTERN REGION NORTHERN REGION NORTH- EASTERN REGION INSTALLED CAPACITY NORTHERN :- 31,230 MW EASTERN :- 17,697 MW SOUTHERN :- 32,704 MW WESTERN :- 32,354 MW NORTH-EASTERN :- 2,357 MW TOTAL 116,342 MW REGIONAL GRIDS

7 SOUTHERN REGION – GEOGRAPHY ANDHRA PRADESH TAMIL NADU KARNATAKA KERALA POPULATION : CRORES ( 22% OF INDIA) AREA :- 651 (‘000 SQ KM)(19% OF INDIA) INSTALLED CAPACITY:- 32,734 MW(28.1%) PER CAPITA CONSUM. – 700 unit (A. I. – 567) WEATHER :- South-west monsoon North-east monsoon SEA COAST :- AROUND 4000 KM

8 INSTALLED CAPACITY IN SR The above capacity does not includes ---About 1342 MW of Wind Mill Capacity in Tamil Nadu. --- Micro and Captive plants in different states. AGENCYHYDROTHERMAL GAS/ DIESEL WIND/ OTHERSNUCLEARTOTAL AP KAR KER TN PONDI C. S IPP TOTAL10939 (33%)15880 (49%)3956 (12%)1099 (3%)830 (3%)32704

9

GENERATING UNITS IN SOUTHERN REGION A.P KAR TNKER GENERATORS ABOVE 1000 MW GENERATORS 500 – 1000 MW GENERATORS BELOW 500 MW TYPICAL GENERATOR SPREAD IN SR - HYDRO - THERMAL - GAS / NAPTHA - NUCLEAR UNIT CAPACITY APKARKERTNCGS TOTA L THERMAL (500 MW) 2810 THERMAL ( MW) GAS/THERMAL ( MW) HYDRO (>50 MW) TOTAL

11 LOAD MW LOAD MW TYPICAL LOAD SPREAD IN SR

KHAMMAM VIJAYAWADA NAGARJUNASAGAR VISAKHAPATNAM (POWERGRID) HYDERABAD RAICHUR GOOTY HOODY SALEM UDUMALPET TRICHUR MADURAI TRICHY MADRAS NEYVELI CUDDAPAH DAVANAGERE KAIGA RSTPP BHADRAVATI 130x2 164x x2 PONDICHERY BANGALORE SIRSI MUNIRABAD P P P P P P P P P P P P P P P N KOLAR PALLOM KAYANKULAM EDAMON TALCHER JEYPORE x78 2x HOSUR KADRA KODASAALY Nagjhari MAPS P SSLMM MMDP THIRUVANATHAPURAM ALMATHI NELLORE 400 KV LINE PRESENTLY OPERATED AT 220 KV NELAMANGALA KURNOOL GAZUWAKA(AP) SIMHADRI NTPC HIRIYUR x x2 221x2 146x2 52x2 197x2 301x2 8x4 15x ABOUT CKM 400KV TRANSMISSION TALGUPPA GRID MAP GRID FOCAL POINT SHIFTED TO KOLAR AFTER COMMISSIONING OF HVDC KOODANKULAM THIRNELVALI TYPICAL FLOWS ARE FROM NORTH TO SOUTH QUANTUM CHANGES IN FLOW PATTERN LIKELY AFTER COMMISSIONING OF KOODANKULAM 2000 MW

13 TYPICAL LOAD CURVE OF SR WINTER MONSOON SUMMER EVENING PEAK

14 GRID OPERATION TYPICAL ISSUES IN THE PAST

15 GRID OPERATION – TYPICAL ISSUES IN PAST LOW / HIGH FREQUENCY PROBLEMS –FREQUENCY EXCURSES TO LOW/HIGH VALUES LOW / HIGH VOLTAGE OPERATION –CRITICALLY LOW VOLTAGES AT LOAD CENTRES –SUBSTANTIALLY HIGH VOLTAGES AT FAR ENDS SYSTEM BROWNOUTS / BLACK OUTS –SEPERATION OF SYSTEMS / LOSS OF LOAD ECONOMIC IN-STABILITY / INCREASED ELECTRICAL LOSSES –UNRELIABLE / INEFFICIENT OPERATION OF EQUIPMENT

16 GRID PRESENT STATUS

< & < & < & Above MaxMinAvgFVI FREQUENCY DURATION CURVE , &

18 FREQUENCY PROFILE 2002, 2003 & 2004

19 FREQUENCY CURVE FOR 9 th SEPTEMBER 2004 FVI = 0.04 Avg Freq = 49.99Hz 10 * ∑ (F – 50) 2 FVI = * 60

20 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 Jan 02 Jan 03

21 Voltage at Bangalore Jan 02 & 03

22 SOUTHERN REGION LOSS * **2005** LOAD (MW) LOSS (MW) LOSS % LOAD (MW) LOSS (MW) LOSS % LOAD (MW) LOSS (MW) LOSS % LOAD (MW) LOSS (MW) LOSS % AP KARNATAKA KERALA TAMILNADU PONDICHERRY CENTRAL GENERATING STATION SOUTHERN REGION *Source : Report of System Studies conducted for Accessing Shunt Compensation requirement in Southern Region – March 2004 and March SREB,CEA ** Projected figures 0.5% REDUCTION MEANS 100 CR ANNUAL SAVINGS 0.5% REDUCTION MEANS 100 CR ANNUAL SAVINGS

23 AVAILABILITY BASED TARIFF OPERATIONAL EXCELLANCE

24 DEEP VALLEY SHARP PEAK

25 KADAMPARAI PUMP OPERATION GENERATOR MODE PUMP SAVINGS OF RS 40 LAKHS EVERY DAY INVESTMENT OF 1600 CRORES SAVED

26 OPPORTUNISTIC UI TRADE POWER EXPORT TO WR ON UI BASIS DURING LOAD CRASH FREQ

27 OPERATION ON 31/08/03 (Ganesh Chathurthi) AMOUNT SAVED FOR SR CONSTITUENTS = 107 LAKHS 50 NOS HVDC SETPOINT CHANGES DONE TO ACHIEVE THIS!!!!!

28 FREE GOVERNOR MODE OF OPERATION ON 12-DEC-04 SHARAVATHI -1 FREQ DROP FROM HZ TO HZ i.e. ~ 0.45HZ

29 FREE GOVERNOR MODE OF OPERATION ON 12-DEC-04 SHARAVATHI -4 FREQ DROP FROM HZ TO HZ i.e. ~ 0.45HZ

30 SHARAVATHI GENERATION – TYPICAL DAY FREQ MW

31 OPTIMAL RESERVOIR UTILISATION SHARAVATHY / IDDUKI PLANT OPERATORS AT THESE STATIONS THINK OF THE RESERVOIR LEVEL IN RUPEES RATHER THAN IN FEET!!! Rs.

HZ

33 MERIT ORDER : UNITS BOXED UP POWER STATIONSTATE CAPACITY(MW) FUEL VARIABLE COST TATA DIESELKARNATAKA 79 DIESEL308 RAYALSEEMA DGPPKARNATAKA 27 DIESEL360 YELEHANKA DIESELKARNATAKA 128 DIESEL314 THANRBHAVIKARNATAKA 220 NAPTHA325 SUB-TOTAL 454 BRAHAMPURAM DPPKERALA 107 DIESEL275 BSESKERALA 157 NAPTHA308 KASARGODE PCLKERALA 22 NAPTHA298 KAYAMKULAMKERALA 360 NAPTHA322 SUB-TOTAL 646 BASIN BRIDGETAMIL NADU 120 NAPTHA584 P.P.NALLURTAMIL NADU 330 NAPTHA415 SUB-TOTAL 450 TOTAL 1550

34 UI IN SR (FROM 01/01/03 TO 07/08/05) OVERVIEW TOTAL UI TURNOVER : MU TOTAL UI AMOUNT DISBURSED: CR AVG WEEKLY TRANSACTION:- 67 MU AVG WEEKLY UI AMOUNT DISBURSED: CR

35 UI SUMMARY – 136 WKS FROM 01/JAN/03 TO 07/AUG/05) STATE --->APKARKERTNPON Total Net UI in MUs exported(-) / Imported(+) Total Net amount in Rs. Crores Receivable(-) / Payable(+) Average rate of UI in paise/unit

36 INTER-REGIONAL EXCHANGES DETAILS UPTO 136 WKS (Till 07-AUG-05) WRER Net Energy Transaction 231 MU IMPORT BY SR 703 MU IMPORT BY SR Amount Due to SR Constituents Rs Cr.Rs Cr. Amount Credited TO SR Constituents Rs Cr.Rs Cr.

37 GRID OPERATION: A TIGHT ROPE WALK BLACK-OUT VOLTAGE COLLAPSE IN-ECONOMIC OPERATION INSTABILITY POWER SWINGS INCREASED LOSSES

38 UI TRANSACTION ON 31/08/03 HIGHLIGHTS OF UI TRANSACTION ON (SUNDAY, GANESH CHATURTHI) UI imported from ER:6.07 MU UI imported from WR:2.81 MU Total UI imported from C. Grid by SR:8.88 MU Average UI rate of C.Grid : 93 Ps/Unit Average UI rate in SR for C.Grid:213 Ps/Unit Max. Power transfer in UI from ER:510 MW Max. Power transfer in UI from WR:350 MW Total Max. Power transfer in UI from C.Grid:860 MW Amount saved for the SR constituents :107 Lacs Total Number of HVDC Operations : 50 no.s

39 METERING LOCATIONS IN SR Total No Of SEMS in SR USED FOR REA 350 No.s Total No Of SEMS in KPTCL USED FOR REA 50 No.s SR METERING DIAGRAM

40 INTER STATE LINES METERING LOCATIONS

41

42 Karnataka's drawl in Raichur-Hoody section: Raichur = -(CK-21) -(CK-23) -(CK-25); Muniarabd=(CK-05) ; Davanagere=(CK-07); Hiriyur=(CK-15); Nelamangala= -(CK-29)-(CK-30)-(CK-35) -(CK-36) -(CK-38); Hoody = (CK-09)+(CK-13) RAICHUR SECTION

43 KPTCL'S DRAWL ON 400kV RAICHUR-DAVANAGERE SECTION (CK-RC)=-(CK-21)-(CK-23)-(CK-25) -(CK-29)-(CK-30)+ (CK-35)+ (CK-36) (CK-38) + (CK-05)+ (CK-07) +(CK-09) + (CK-13) + (CK-15) KPTCL'S DRAWL ON 400kV (CK-91)= (CK-01)+(CK-03)+(CK-RC) +(CK-11) CK'S DRAWL ON 220kV (CK-92)= -(CK-51)-(CK-53)-(CK-54)-(CK-55)-(CK-58)-(CK-59)+(KG-21) +(KG-22)+(KG-23)+(KG-24) CK'S DRAWL ON 132kV (CK-93)=-(CK-52)-(CK-56) TOTAL DRAWL (CK-94)=(CK-91)+(CK-92)+(CK-93) NOTE: SEMS ON FEEDERS NOT CARRYING ISGS POWER NOT TO BE CONSIDERED