1. FREQUENCY PATTERN DURING JAN 2007 Freq Profile 1-11 Freq Profile 12-21 Freq Profile 22-31

2. FREQUENCY EXCURSION BELOW 49.0 HZ & 49.5 HZ Frequency Trend for 31-01-07 Frequency Trend for 01-02-07

3. 74(8%) TIME BLOCKS FREQ WAS BELOW 49Hz 870(91%) TIME BLOCKS FREQ WAS BELOW 49.5 Hz State No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn TAMIL NADU 54 (6%)92068314 (33%)578174 KARNATAKA 65 (7%)1790110821 (86%)49580242 ANDHRA PRADESH 30 (3%)48865539 (56%)34242254 PUDUCHERRY 9 (1%)16773 (8%)1719 GOA 31 (3%)9612323 (34%)84110 KERALA 18 (2%)13730449 (47%)204818 STATE OVER DRAWAL @ <49.0 & 49.5HZ JAN 12 – 21, 2007

4. NON DESPATCHED GENERATION IN SR DURING Oct – 06Nov – 061-15 Dec 06 16-31 Dec 06 1-11 Jan 07 12-21 Jan 07 StateStation Installed Capacity (MW) FuelVar. Cost Ps./Unit MW Not Despatched MW Not Despatched MW Not Despatched MW Not Despatched MW Not Despatched MW Not Despatched KarnatakaTata Electric 79Diesel590 78 000 Yelahanka 128Diesel622 126 860 Thannerbavi 220Naptha626 218 000 Sub-Total 422 126860 Kerala Kayamkulam 360Naptha580 353 3618636 BSES 157Naptha560 154 Sub-Total 507 190340190 Tamil NaduBasin Bridge 120Naptha863 105 000 Sub-Total 105 000 TOTAL 1034 717466276190 CAPACITY NOT HARNESSED

5. OTHER LINKS OVER DRAWAL SCADA VIOLATION MESSAGES INTER REGIONAL IMPORTS / EXPORTS UI Vs FREQ JAN 01 – 11, 07 UI Vs FREQ JAN 12 – 21, 07 UI Vs FREQ JAN 22 – 31, 07 DAILY TRENDS UI Vs FREQ STOA

6. FREQUENCY PATTERN DURING OCT TO DEC 2006

7. FREQUENCY PATTERN DURING OCT DEC & JAN 06-07 Note : January data for 24 days i.e. excluding Pongal (13 th to 16 th ) & Republic day (26 th to 28 th ) holidays.

8. FREQUENCY EXCURSION BELOW 49.0 HZ

9. AVERAGE FREQUENCY OF SR AND CG AVG. FREQ (HZ) JAN 01 – 11 49.1849.15 JAN 12 – 21 49.3149.08 JAN 22 – 31 49.2149.14 SOUTHERN REGION JANUARY 2007 CENTRAL GRID

10. 326(31%) TIME BLOCKS FREQ WAS BELOW 49Hz 1014(96%) TIME BLOCKS FREQ WAS BELOW 49.5 Hz State No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn TAMIL NADU 293 (28%)10566144638 (60%)21529135 KARNATAKA 247 (23%)517884881 (83%)39630180 ANDHRA PRADESH 132 (13%)232771487 (46%)20269166 PUDUCHERRY 235 (22%)89815485 (46%)203217 GOA 77 (7%)1186229(22%)3246 KERALA 5 (0%)2722172(16%)97123 STATE OVER DRAWAL @ <49.0 & 49.5HZ JAN 01 – 11, 2007

11. 76(11%) TIME BLOCKS FREQ WAS BELOW 49Hz 646(96%) TIME BLOCKS FREQ WAS BELOW 49.5 Hz State No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn TAMIL NADU 41 (6%)49748189 (28%)298363 KARNATAKA 65 (10%)1851114570 (85%)27835195 ANDHRA PRADESH 57 (8%)1622114432 (64%)25496236 PUDUCHERRY 4 (1%)4411 (2%)155 GOA 19 (3%)143102 (15%)1134 KERALA 8 (1%)2111289 (43%)88812 STATE OVER DRAWAL @ <49.0 & 49.5HZ JAN 22 – 28, 2007

12. NON DESPATCHED GENERATION IN SR DURING JAN 01 – 11, 07JAN 12 – 21, 07JAN 22 – 31, 07 StateStation Installed Capacity (MW) FuelVar. Cost Ps./Unit MW Not Despatched MW Not Despatched MW Not Despatched Karnataka Tata Electric 79Diesel590 321914 Yelahanka 128Diesel622 836497 Thannerbavi 220Naptha626 1285974 Sub-Total 243142185 Kerala Kayamkulam 360Naptha580 1256879 BSES 157Naptha560 154 Sub-Total 279222233 Tamil Nadu Basin Bridge 120Naptha863 105116110 Sub-Total 105116110 TOTAL 627480528 AVG MW NOT AVAILABLE TO THE GRID

13. 287(27%) TIME BLOCKS FREQ WAS BELOW 49Hz 1003(95%) TIME BLOCKS FREQ WAS BELOW 49.5 Hz State No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn ANDHRA PRADESH 164 (16%)308375318 (30%)666284 KARNATAKA 214 (20%)456185470 (45%)11723100 KERALA 1 (0%)152 (0%)714 TAMIL NADU 226 (21%)6737119425 (40%)12277116 STATE OVER DRAWAL @ <49.0 & 49.5HZ JAN 01 – 11, 2007

14. STATE OVER DRAWAL @ <49.0 & 49.5HZ JAN 12 – 21, 2007 51(5%) TIME BLOCKS FREQ WAS BELOW 49Hz 854(89%) TIME BLOCKS FREQ WAS BELOW 49.5 Hz State No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn ANDHRA PRADESH 26 (3%)48274377 (39%)16497175 KARNATAKA 39 (4%)1145117519 (54%)21668167 KERALA 4 (0%)45 17 (2%)14735 TAMIL NADU 15 (2%)13837146 (15%)204756

15. STATE OVER DRAWAL @ <49.0 & 49.5HZ JAN 22 – 28, 2007 56(8%) TIME BLOCKS FREQ WAS BELOW 49Hz 660(98%) TIME BLOCKS FREQ WAS BELOW 49.5 Hz State No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn No.of time blocks in which state overdrew MWH Overdrawal Average MW overdrawn ANDHRA PRADESH 45 (7%)1357121456 (68%)25764226 KARNATAKA 42 (6%)1174112549 (82%)23790173 KERALA 2 (0%)3662 (9%)28318 TAMIL NADU 16 (2%)1654193 (14%)145162

16. VIOLATION MESSAGES ISSUED State Type A Message issued Violation of Clause 6.4.4 Violation of Clause 6.4.9 Total Violation Andhra Pradesh 5515171 Karnataka6817893 Tamil Nadu574319119 Kerala0000 Total1807528283 Type A message issued when freq 100MW JAN 01 – 11, 2007

17. VIOLATION MESSAGES ISSUED State Type A Message issued Violation of Clause 6.4.4 Violation of Clause 6.4.9 Total Violation Andhra Pradesh 496055 Karnataka537060 Tamil Nadu6006 Kerala0000 Total108130121 Type A message issued when freq 100MW JAN 12 – 21, 2007

18. VIOLATION MESSAGES ISSUED State Type A Message issued Violation of Clause 6.4.4 Violation of Clause 6.4.9 Total Violation Andhra Pradesh 627170 Karnataka496156 Tamil Nadu1000 Kerala0000 Total121132136 Type A message issued when freq 100MW JAN 22 – 30, 2007

19. INTER-REGIONAL IMPORTS Energy in MUs MAX MWEnergy in MUs MAX MW JAN 01 – 11 14.147739.85798 JAN 12 – 21 2.384212.41324 FROM WESTERN REGION JANUARY 2007 FROM EASTERN REGION

20. INTER-REGIONAL EXPORTS Energy in MUs MAX MWEnergy in MUs MAX MW JAN 01 – 11 0.721902.92134 JAN 12 – 21 5.495704.42276 FROM WESTERN REGION JANUARY 2007 FROM EASTERN REGION

21. UI Vs FREQUENCY OF ANDHRA PRADESH 01-JAN-07 JAN 01 – 11, 2007

22. UI Vs FREQUENCY OF KARNATAKA 09-JAN-07 JAN 01 – 11, 2007

23. UI Vs FREQUENCY OF TAMIL NADU 02-JAN-07 JAN 01 – 11, 2007

24. UI Vs FREQUENCY OF ANDHRA PRADESH 20-JAN-07 JAN 12 – 21, 2007

25. UI Vs FREQUENCY OF KARNATAKA 15-JAN-07 JAN 12 – 21, 2007

26. UI Vs FREQUENCY OF TAMIL NADU 13-JAN-07 JAN 12 – 21, 2007

27. UI Vs FREQUENCY OF ANDHRA PRADESH 24-JAN-07 JAN 22 – 31, 2007

28. UI Vs FREQUENCY OF KARNATAKA 28-JAN-07 JAN 22 – 31, 2007

29. UI Vs FREQUENCY OF TAMIL NADU 27-JAN-07 JAN 22 – 31, 2007

30. SR CONSTITUENTS EXPORT STOAs DURING THE PERIOD 01-11 th JAN 07 CONSTITUENTAVG. OFF PEAK MW AVG. PEAK MWTOTAL MUAVG MW APTRANSCO26.80 7.0526.8 KPTCL223.16200.4947.67181 KSEB434.59234.5983.09315 TNEB268.60.015.9761

31. SR CONSTITUENTS IMPORT STOAs DURING THE PERIOD 01-11 th JAN 07 CONSTITUENTAVG. OFF PEAK MW AVG. PEAK MWTOTAL MUAVG MW APTRANSCO234.1528.41 29.68 112 KPTCL0.0 KSEB0.0 TNEB120.8121.831.18118

32. SR CONSTITUENTS EXPORT STOAs DURING THE PERIOD 12-21 st JAN 07 CONSTITUENTAVG. OFF PEAK MW AVG. PEAK MW TOTAL MUAVG MW APTRANSCO26. 80 6.4326.8 KPTCL192.49175.4440.98171 KSEB484.80287.8888.98371 TNEB590.400.039.06163

33. SR CONSTITUENTS IMPORT STOAs DURING THE PERIOD 12-21 st JAN 07 CONSTITUENTAVG. OFF PEAK MW AVG. PEAK MW TOTAL MUAVG MW APTRANSCO220.3914.96 25.48 106 KPTCL0.0 KSEB0.0 TNEB140.86143.9431.24130

34. SR CONSTITUENTS EXPORT STOAs DURING THE PERIOD 22-31 st JAN 07 CONSTITUENTAVG. OFF PEAK MW AVG. PEAK MWTOTAL MUAVG MW APTRANSCO26. 826.80 6.43 26.8 KPTCL200.17187.0440.78170 KSEB497.8397.889.56373 TNEB667.20.037.99158

35. SR CONSTITUENTS IMPORT STOAs DURING THE PERIOD 22-31 st JAN 07 CONSTITUENTAVG. OFF PEAK MW AVG. PEAK MWTOTAL MUAVG MW APTRANSCO204.1342.11 25.70 107 KPTCL0.0 KSEB0.0 TNEB163.79 35.37147

36. BACK

38. DateDayMin. Freq. Hz. Avg. Freq. Hz. 49.0 Hz. and below49.5 Hz. and below % of Time No. of excursions % of Time No. of excursions 1-Jan-07Monday 48.6449.2410.91590.218 2-Jan-07Tuesday 48.6549.1627.92787.715 3-Jan-07Wednesday 48.5849.0836.53499.54 4-Jan-07Thursday 48.5949.04393899.53 5-Jan-07Friday 48.5849.1231.73592.57 6-Jan-07Saturday 48.6149.1621.62189.112 7-Jan-07Sunday 48.7149.295.6487.428 8-Jan-07Monday 48.8949.293.5880.418 9-Jan-07Tuesday 48.7849.2314.22186.915 10-Jan-07Wednesday 48.749.2214.51493.121 11-Jan-07Thursday 48.6449.1719.72195.512 Average for the period 48.6749.1820.462291.0714 Frequency Profile during the period 1st to 11th January 2007

39. DateDayMin. Freq. Hz. Avg. Freq. Hz. 49.0 Hz. and below49.5 Hz. and below % of Time No. of excursions % of Time No. of excursions 12-Jan-07Friday 48.7749.217.7992.252 13-Jan-07Saturday 48.9549.251.3193.111 14-Jan-07Sunday 48.9249.40.8268.527 15-Jan-07Monday 48.7749.421.9366.730 16-Jan-07Tuesday 48.8649.373.5770.417 17-Jan-07Wednesday 48.8349.312.41072.819 18-Jan-07Thursday 48.7349.295.357632 19-Jan-07Friday 48.6449.272.7577.121 20-Jan-07Saturday 48.6749.282.6687.221 21-Jan-07Sunday 48.8149.271.5586.421 Average for the period 48.849.312.97579.0425 Frequency profile during the period 12th to 21st January 2007

40. DateDayMin. Freq. Hz. Avg. Freq. Hz. 49.0 Hz. and below49.5 Hz. and below % of Time No. of excursions % of Time No. of excursions 22-Jan-07Monday 48.7349.185.61698.17 23-Jan-07Tuesday 48.6449.183.6998.010 24-Jan-07Wednesday 48.8349.191.7996.113 25-Jan-07Thursday 48.5949.195.11192.916 26-Jan-07Friday 48.7149.274.0985.622 27-Jan-07Saturday 48.8049.253.7791.217 28-Jan-07Sunday 48.8649.270.8587.217 29-Jan-07Monday 48.5949.241.3787.123 30-Jan-07Tuesday 48.8249.160.7396.15 31-Jan-07Wednesday 48.7849.155.81798.82 Average for the period 48.7449.213.239.393.1713.2 Frequency profile during the period 22nd to 31st January 2007