FREQUENCY EVENTS NTPC (INJECTION - DC) ISSUES NLY – II STAGE 1 (INJECTION - DC) NLY – II STAGE 2 (INJECTION - DC) NLY TPS I (Exp) (INJECTION - DC) ULDC ISSUES RESERVOIR LEVEL TALCHER STAGE II (INJECTION - DC) UI TRANSACTION HYDRO GENERATION COMP TH OCC - 07 – DECEMBER – 04. DEMANDVOLTAGE PROFILE TALCHER - KOLAR SCH Vs DRL 3D SR UI RATE NOV D ER UI RATE NOV - 04

FREQUENCY df/dt & d 2 f/dt 2 FREQ DURATION CURVE 3D FREQ NOV - 04 TYPICAL FREQ GRAPH 3D FREQ NOV - 03 FREQ COMPARISION NOV-03 & NOV-04 3D FREQ OCT - 04 HISTOGRAM OF FREQ 2002 – 03 – 04

DEMAND ANTICIPATED Vs ACTUAL DEMAND INDICES 3D DEMAND NOV - 04 LOAD DURATION CURVE 3D DEMAND NOV - 03 DEMAND Vs FREQ NOV-04 3D DEMAND OCT - 04 MAX, MIN & AVG STATE DRAWAL

390 TH OCC - 07 – DECEMBER – 04. MORE LINKS TO REACTIVE 3D VIRTUAL REALITY STATE 3D VIRTUAL REALITY ISGS/INTER-REGIONAL MUST SEE

3D VIRTUAL REALITY DEMAND ANDHRA PRADESH KERALA KARNATAKA TAMIL NADU STATE SCHEDULE ANDHRA PRADESH KERALA KARNATAKA TAMIL NADU STATE DRAWAL ANDHRA PRADESH KERALA KARNATAKA TAMIL NADU STATE UI ANDHRA PRADESH KERALA KARNATAKA TAMIL NADU PONDY GOA PONDY GOA PONDY GOA

3D VIRTUAL REALITY ISGS INJECTION NTPC NLY-II STAGE II NLY-II STAGE I TALCHER STAGE II ISGS UI INTER-REGIONAL EXCHANGES WR ER NEYVELI TPS I (Exp) MAPS KAIGA SPARE NTPC NLY-II STAGE II NLY-II STAGE I TALCHER STAGE II NEYVELI TPS I (Exp) MAPS KAIGA SPARE

MORE LINKS TO REACTIVE REACTORS POSITION CAPABILITY CURVES REACTIVE ENERGY LOW VOLTAGE REACTIVE ENERGY HIGH VOLTAGE

NOV-04 NOV-03 <49 HZ HZ>50.5HZ Nov Nov LIGNITE / COAL SHORTAGE 2.S/D OF KADAMPARI UNITS

FREQUENCY CURVE FOR 11 th NOVEMBER 2004 FVI = 0.13 Avg Freq = 50.04Hz COMPARISION

FREQUENCY CURVE FOR 19 th NOVEMBER 2004 FVI = 2.33 Avg Freq = 49.58Hz TN O/D ~300 MW KER O/D ~150 MW

FREQUENCY COMPARISION FVI = 0.13 AVG FREQ = 50.04HZ 11-NOV-04 FVI = 0.14 AVG FREQ = 49.93HZ 17-OCT-04 FVI = 0.04 AVG FREQ = 49.99HZ 09-SEP-04

COMPARISON DEMAND INDICES FOR NOVEMBER 2004 TABLE

DEMAND INDICES FOR NOVEMBER 2004

LOAD DURATION CURVE OF SOUTHERN REGION FOR NOVEMBER 2004 & NOVEMBER NOV-04 NOV-03

REACTIVE ENERGY DRAWAL DURING LOW VOLATGE CONDITION In Mvarh Nov-04

REACTIVE ENERGY DRAWAL DURING HIGH VOLATGE CONDITION In Mvar Nov-04

MAXIMUM & MINIMUM DRAWAL NOV-04 STATEAVG DRAWAL MAX DRAWAL NOV 04 TILL NOW ENTITLEMENT WITH TAL 1500MW 2000MW MIN DRAWAL NOV 04 TILL NOW AP KAR KER TN PONDY APR-04 OCT-04APR-04 MAR-04 FEB-04 AUG-04 OCT-03 DEC-03 AUG-04

SCHEDULE Vs DRAWAL  ANDHRA PRADESH  U/D THROUGHOUT THE DAY  NOT FOLLOWING THE PRICE SIGNAL  KARNATAKA  METICULOUSLY FOLLOWS THE PRICE SIGNAL  KERALA  FOLLOWS THE PRICE SIGNAL  SOME O/D DURING EVENING PEAK  TAMIL NADU  HEAVY U/D DURING NIGHT OFF-PEAK & O/D DURING EVENING PEAK  NOT CONDUSIVE FOR SECURE & ECONOMIC GRID OPERATION. GRAPHS

TALCHER-KOLAR IMPORT OF 13447MUs FROM ER THROUGH TALCHER-KOLAR UPTO NOV-04 YEAR ---> MONTHS TOTAL ENERGY (IN MU) MAX FLOW (IN MW) TOTAL ENERGY (IN MU) MAX FLOW (IN MW) TOTAL ENERGY (IN MU) MAX FLOW (IN MW) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTAL AVERAGE MAX FLOW

DEMAND INDICES - COMPARISON May-04Jun-04Jul-04Aug-04Sep-04Oct-04Nov-04 ANDHRA PRADESH LEAN/PEAK AVG/PEAK KARNATAKA LEAN/PEAK AVG/PEAK KERALA LEAN/PEAK AVG/PEAK TAMILNADU LEAN/PEAK AVG/PEAK SOUTHERN REGION LEAN/PEAK AVG/PEAK

RESERVOIR LEVEL - COMPARISON LEVEL IN MTS LEVEL 30-Nov-03 LEVEL 30-Nov-04 JALAPUT LINGANMAKKI SUPA IDUKKI KAKKI NILGIRIS TOTAL ENERGY 30-Nov-03 ENERGY 30-Nov-04 RISE IN MU % RISE Only 7500MUs Reserve till next monsoon (6 Months) 40 MUs/day could be generated as against about 70 MUs/day at present.

ANTICIPATED Vs ACTUAL CONSUMPTION FOR NOVEMBER – 04 DESCRIPTION ANDHRA PRADESHKARNATAKAKERALATAMIL NADU SOUTHERN REGION ANTPD. ACTUAL ANTPD. ACTUAL ANTPD. ACTUAL ANTPD. ACTUAL ANTPD. ACTUAL THERMAL DIESEL + GAS HYDRO IPPs CONSUMPTION PER DAY

MAJOR EVENTS 1.FREQUENCY DURING NOVEMBER 2004 :- >>99.63% WITHIN IEGC RANGE. 2.NO UFR OPERATION DURING NOVEMBER – AROUND 20 MU PER DAY OF COSTLY GENERATION NOT DESPATCHED.AROUND 20 MU PER DAY OF COSTLY GENERATION NOT DESPATCHED 4.SR MET A DEMAND OF 20,184 MW IN NOVEMBER – 2004SR MET A DEMAND OF 20,184 MW IN NOVEMBER – 2004 (VERY CLOSE TO LAST YEAR) 5.GROUND RETURN MODE TESTING CARRIED OUT ON KOLAR HVDC POLES FROM 20-NOV-04 TO 01-DEC-04GROUND RETURN MODE TESTING CARRIED OUT ON KOLAR HVDC POLES FROM 20-NOV-04 TO 01-DEC-04 6.TESTING OF POD OF TCSC ON 400 KV D/C RAIPUR - ROURKELA LINES ON 19- NOV TALCHER – KOLAR POLE II 11:21 HRS. 2.FLOW CAME DOWN FROM 1600 MW TO 1000MW 3.FREQ CAME DOWN FROM HZ TO HZ 4.TALCHER – KOLAR POLE II 11:39 HRS.

DEMAND Vs FREQUENCY FOR 23-NOV-04

ISSUES 1.VOLTAGE CONTROL 1.PARTICIPATION OF GENERATORS IN REACTIVE POWER MANAGEMENT 2.SWITCHING OFF CAPACITORS DURING NIGHT. 3.EXPEDITION OF NELLORE ICT 4.400KV LINE OPENING WHICH IS NOT CONDUCIVE TO SECURE GRID400KV LINE OPENING WHICH IS NOT CONDUCIVE TO SECURE GRID 2.ISGS REQUESTED TO PROPERLY DECLARE THEIR DC AS PER CERC NORMS.ISGS REQUESTED TO PROPERLY DECLARE THEIR DC AS PER CERC NORMS 3.COAL SHORTAGE PROBLEM AT PIT-HEAD STATIONS LIKE TALCHER STAGE II RESTRICTING CHEAPER POWER. 4.JUDITIOUS UTILISATION OF HYDRO RESERVES FOR SUMMER DAYS AHEADJUDITIOUS UTILISATION OF HYDRO RESERVES FOR SUMMER DAYS AHEAD 5.FREQUENCY DIP IN THE EVEVING PEAK HOURS DUE TO OVER DRAWAL BY TN IN THE RANGE OF MW AS WELL AS UNDER DRAWAL ( MW) DURING LEAN PERIODS PUSHING FREQUENCY TO ABOVE 50Hz.OVER DRAWAL BY TN IN THE RANGE OF MW AS WELL AS UNDER DRAWAL ( MW 6.REGULATION OF GENERATION AT SRISAILAM TO THE BENEFIT OF THE ENTIRE REGIONREGULATION OF GENERATION AT SRISAILAM TO THE BENEFIT OF THE ENTIRE REGION 7.INADEQUATE RESPONSE OF GENERATORS IN FREE GOVERNOR MODEINADEQUATE RESPONSE OF GENERATORS IN FREE GOVERNOR MODE LAST NTPC

SR – ULDC NTPC, RAMAGUNDAM FIELD INPUTS EXTENSION –NTPC to extend field inputs for the following –MW&MVAR of LV/HV side of U# 7. –MW&MVAR of 400kV side GT's & Tie- transformer. –MW&MVAR of 132kV feeder 1&2 & MVAR of NSR 1&2 line reactor. –OLTC of 5 ICT's –CB closed status for all feeders,units & transformer. –SOE's for all feeders,units & transformer. –Closed status for all isolators. –TO BE EXPEDITED ULDC TRAINING –DATABASE TRAINING SCHEDULED FROM 22 nd NOVEMBER TO 4 TH DECEMBER COMPLETED

ULDC TRAININGS CONDUCTED SO FAR BY SRLDC SLNAME OF THE TRAININGFROMTO ParticipantsMan days 1 CISCO ROUTER & NETWORKING XA-21 USER LEVEL RTNA WORKSHOP AIX OPERATING SYSTEM XA-21 USER LEVEL DATABASE ADMINISTATION

INTER – REGIONAL(01/11/04 TO 28/11/04) (+) IMPORT / (-) EXPORT INTER REGIONAL UI (WR):- +NIL – 13 MU INTER REGIONAL UI (ER):- +4 MU – 4 MU AVG RATE OF EXPORT TO WR IN PS/U –192 –325 AVG RATE OF IMPORT FROM ER IN PS/U –79 ER –228 SR AVG RATE OF EXPORT TO ER IN PS/U –433 –253

ER – SR UI TRANSACTIONS FACTS PAST DECISION BENEFITS WR BENEFITS ER

ER-SR FREQUENCY AND UI FOR 26-NOV-04 09:00 -12:00 Hrs

FREQUENCY CURVE FOR 2 nd NOVEMBER 2004 FVI = 0.77 Avg Freq = 49.83Hz

400KV LINES OPENED TO CONTROL OVER VOLTAGE 1.VIJAYAWADA – NELLORE CKT I 2.NELLORE – MADRAS CKT I & II 3.VIJAYAWADA – SRISAILAM I & II. 4.NEYVELI – SALEM II 5.SALEM – UDUMALPET I 6.TRICHY – MADURAI II 7.UDUMALPET – TRICHUR I 8.KOLAR –MADRAS 9.KOLAR-HOSUR II 10.HIRIYUR-NELAMANGALA I 11.HIRIYUR – GUTTUR I

FGMO DEAD BANDS & LOAD LIMITERS TO BE WITHDRAWN HYDRO UNITS RESPONSE TO BE CONFIRMED MORE RIGOROUS MONITORING BY SLDCs AND STATION CHIEFs SELF CERTIFICATION STILL AWAITED FROM MANY »RECEIVED FROM NTPC, NLY-II, NLY TPS I (EXP), TTPS, MTPS, NCTPS, VTS, KTS, RYTPS, SIMHADRI, LANCO, SPECTRUM & GVK

AUTOMATIC VOLTAGE REGULATOR OPERATION Quote 6.2 (j) All generating units shall normally have their automatic voltage regulators (AVRs) in operation, with appropriate settings. In particular, if a generating unit of over fifty (50) MW (10 mw incase of North-Eastern region) size is required to be operated without its AVR in service, the RLDC shall be immediately intimated about the reason and duration, and its permission obtained. Power System Stabilisers (PSS) in AVRs of generating units (wherever provided), shall be properly tuned as per a plan prepared for the purpose by the CTU from time to time. CTU will be allowed to carry out tuning/checking of PSS wherever considered necessary. Unquote CERC Order ON ‘IEGC’ dated