1 SOUTHERN REGIONAL LOAD DESPATCH CENTRE POWER GRID CORPORATION OF INDIA LIMITED PRESENTATION ON ROLE OF REGULATORS IN SELLING EXCESS POWER FROM CPPs 31ST May, 2005 by V.K AGRAWAL AGM, SRLDC

2 PRESENTATION OVERVIEW  SR GRID AND IPP’ ROLE - QUICK FACTSSR GRID AND IPP’ ROLE - QUICK FACTS  OPEN ACCESS REGULATIONS – RECENT CHANGES OPEN ACCESS REGULATIONS – RECENT CHANGES  IMPACT OF CHANGES – CASE STUDIES IMPACT OF CHANGES – CASE STUDIES  SHORT TERM OPEN ACCESS – EXPERIENCES SHORT TERM OPEN ACCESS – EXPERIENCES  REGULATORS DELIGHT – MORE BUT LESS REGULATORS DELIGHT – MORE BUT LESS  STATE SECTOR – CHALLENGES & TASKS AHEAD STATE SECTOR – CHALLENGES & TASKS AHEAD

3 THANK YOU

4 SOUTHERN REGIONAL GRID QUICK FACTS

5 SOUTHERN REGION WESTERN REGION EASTERN REGION NORTHERN REGION NORTH- EASTERN REGION INSTALLED CAPACITY NORTHERN :- 31,230 MW EASTERN :- 17,697 MW SOUTHERN :- 32,734 MW WESTERN :- 32,354 MW NORTH-EASTERN :- 2,357 MW TOTAL 116,372 MW REGIONAL GRIDS

6 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

7 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. STATESHYDROTHERMALNUCLEARDIESEL/GAS WIND/ OTHERSTOTAL % AP % KAR % KER % TN % PONDY % C.S % IPP % TOTAL %33%49%3%12%3%

8 SOURCE-WISE INSTALLED CAPACITY OF SR IN MW 32,734 MW HYDRO THERMAL WIND/OTHERS NUCLEAR GAS

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

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

11 TYPICAL LOAD CURVE OF SR WINTER MONSOON SUMMER EVENING PEAK WEATHER RESERVOIRCONSUMPTION

12 DEEP VALLEY SHARP PEAK

13 GRID OPERATION TYPICAL ISSUES IN THE PAST

14 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

15 GRID PRESENT STATUS

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

17 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

18 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

19 GRID PRESENT STATUS CARDINAL EVENTS

20 GRID PRESENT STATUS -- CARDINAL EVENTS AVAILABILITY BASED TARIFF UNIFIED LOAD DESPATCH SCHEME GENERATION ADDITION INTERREGIONAL AC / HVDC LINKSINTERREGIONAL AC / HVDC LINKS OPERATIONAL EXCELLANCE

21 APKARKERTNPONDY Total UI exported(-) / Imported(+) in MUs Total amount paid in Crores Rs Average rate of UI in paise/unit SUMMARY OF UI – 124 WKS (FROM 01/JAN/03 TO 15/MAY/05)

22 UI IN SR (FROM 01/01/03 TO 15/05/05) TOTAL UI TURNOVER : MU TOTAL UI AMOUNT DISBURSED: CR AVG WEEKLY TRANSACTION:- 63 MU AVG WEEKLY UI AMOUNT DISBURSED:- 13 CR

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

24 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