power grid corporation of india ltd

POWER GRID CORPORATION OF INDIA LTD

SOUTHERN REGIONAL LOAD DESPATCH CENTRE

in

3rd SRPC MEETING

19th February 2007

Bangalore

GRID EVENTS AND ISSUES

POWER SUPPLY POSITION FOR THE PERIOD FROM OCT 06 TO FEB 07

MAXIMUM DEMAND MET:

STATE WISE MAXIMUM DEMAND MET:

MW MUsCURRENT YEAR 23,434 523.36LAST YEAR 23,164 462.86

AGENCY Current Year (MW)

Last Year (MW)

Current Year (MUs)

Last Year (MUs)

ANDHRA PRADESH 8,158 8,210 174.68 165.75

KARNATAKA 5,758 5,478 130.02 120.83

KERALA 2,669 2,519 43.16 39.74

TAMIL NADU 8,319 7,902 175.77 157.26

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Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 (upto12th)

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<49.0HZ <49.5HZ <50.0HZ

FREQUENCY SPECTRUM FROM OCT 06 TO FEB 07 (UPTO 12TH FEB 07)

< 49.0 HZ < 49.5 HZ < 50.0 HZ 49 - 50.5 HZ >50.0HZ >50.2HZ >50.5 HZ

Oct-06 10.53 52.20 88.30 89.46 11.70 1.91 0.01

Nov-06 0.69 51.06 95.14 99.30 4.86 0.98 0.01

Dec-06 10.40 88.46 99.88 89.60 0.12 0.00 0.00

Jan-06 9.26 87.87 99.65 90.69 0.35 0.15 0.05

Feb-07 (upto 12th) 3.73 88.93 99.58 96.23 0.43 0.18 0.04

Date: 17th October 2006

PRESS RELEASE

CERC directs PowerGrid to ensure grid stability

1. In order to take action for violating the Indian Electricity Grid Code (IEGC) by drawing electricity in excess of their schedule drawal, the Central Electricity Regulatory Commission (CERC) has directed PowerGrid to furnish the list of States and their quantum of overdrawals in the time-blocks when the frequency in the extended Central Grid was below 49.0 Hz during the period 9th to 15th October 2006.

2. The Commission has further directed all the RLDCs to keep a strict watch over the Grid Code violations, which can possibly endanger the grid stability and promptly inform the Commission about the defaulters with appropriate recommendation regarding remedial action.

3. The maintenance of satisfactory grid frequency has assumed added importance after synchronization of Northern Regional Grid with Central Grid comprising Western, Eastern and North-Eastern Regional Grids. In this context, the IEGC requires that the various beneficiary States shall always endeavor to restrict their net drawal from the grid to their respective drawal schedules, whenever the system frequency is below 49.5 Hz and when the frequency falls below 49.0 Hz, the requisite load shedding shall be carried out by the concerned State to curtail its over drawal.

S. K. ChatterjeeAssistant Secretary

STATE OVER DRAWAL @ <49.0 & 49.5HZ

FOR OCT & DEC 2006

STATE No of

BlocksO/D Mus < 49.0Hz

AVG MW

No of Blocks

O/D Mus < 49.5Hz

AVG MW

AP 554 18.97 137 3443 237.82 276

KAR 665 21.10 127 3347 114.48 137

KER 63 0.64 41 640 4.56 29

TN 649 21.02 130 2251 68.55 122

PONDY 685 4.32 25 2627 13.49 21

GOA 370 1.34 14 1635 6.02 15

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


MWH Overdrawal


TAMIL NADU 293 (28%) 10566 144 638 (60%) 21529 135

KARNATAKA 247 (23%) 5178 84 881 (83%) 39630 180

ANDHRA PRADESH 132 (13%) 2327 71 487 (46%) 20269 166

PUDUCHERRY 235 (22%) 898 15 485 (46%) 2032 17

GOA 77 (7%) 118 6 229(22%) 324 6

KERALA 5 (0%) 27 22 172(16%) 971 23


JAN 01 – 11, 2007





MWH Overdrawal




MWH Overdrawal


TAMIL NADU 54 (6%) 920 68 314 (33%) 5781 74

KARNATAKA 65 (7%) 1790 110 821 (86%) 49580 242

ANDHRA PRADESH 30 (3%) 488 65 539 (56%) 34242 254

PUDUCHERRY 9 (1%) 16 7 73 (8%) 171 9

GOA 31 (3%) 96 12 323 (34%) 841 10

KERALA 18 (2%) 137 30 449 (47%) 2048 18


JAN 12 – 21, 2007





MWH Overdrawal




MWH Overdrawal


TAMIL NADU 41 (6%) 497 48 189 (28%) 2983 63

KARNATAKA 65 (10%) 1851 114 570 (85%) 27835 195

ANDHRA PRADESH 57 (8%) 1622 114 432 (64%) 25496 236

PUDUCHERRY 4 (1%) 4 4 11 (2%) 15 5

GOA 19 (3%) 14 3 102 (15%) 113 4

KERALA 8 (1%) 21 11 289 (43%) 888 12


JAN 22 – 28, 2007



State



MWH Overdrawal




MWH Overdrawal


ANDHRA PRADESH 24 (4%) 474 79 381 (57%) 25161 264

KARNATAKA 44 (7%) 1405 128 574 (85%) 38176 266

KERALA

14 (2%) 121 35 328 (49%) 1584 19

TAMIL NADU 32 (5%) 489 61 179 (27%) 2787 62

PUDUCHERRY 8 (1%) 16 8 58 (9%) 145 10

GOA 29 (4%) 100 14 280 (42%) 794 11


JAN 15 – 21, 2007

STATE

No. of Time Blocks

(overdrew)MWH

OverdrawaAverage MW overdrawn

TAMILNADU 110 7146 260

KARNATAKA 70 3351 191

ANDHRA PRADESH 53 1782 134

PUDUCHERRY 109 1439 53

GOA 86 314 15

KERALA 0 0 0

Summary of ODs at Freq. LT 49 HZ. During the week

STATE

No. of Time Blocks

(overdrew)MWH

Overdrawa

Average MW

overdrawn

TAMILNADU 108 2976 110




GOA 107 458 17

KERALA 19 254 53

09-10-06 TO 15-10-06 16-10-06 TO 22-10-06

STATE

No. of Time Blocks

(overdrew)MWH




TAMILNADU 54 947 72


KERALA 25 280 44

GOA 44 85 8

23-10-06 TO 29-10-06

STATE

No. of Time Blocks

(overdrew)MWH




KERALA 61 661 43

TAMIL NADU 364 25429 279


GOA 260 1182 18

Summary of ODs at Freq. LT 49.5 HZ. During the week

STATE

No. of Time Blocks

(overdrew)MWH

Overdrawa

Average MW

overdrawn


KARNATAKA 358 11040 123

KERALA 112 817 29

TAMIL NADU 248 6380 103


GOA 420 1594 15

09-10-06 TO 15-10-06 16-10-06 TO 22-10-06

STATE

No. of Time Blocks

(overdrew)MWH



KARNATAKA 473 23170 196

KERALA 176 1577 36

TAMIL NADU 151 2259 60


GOA 172 422 10

23-10-06 TO 29-10-06

STATE

No. of Time Blocks for which State

overdrew below 49 Hz.

MWH Overdrawal below 49 Hz


below 49 Hz



KERALA 64 375 23

TAMIL NADU 844 23801 113


GOA 317 801 10

Summary of ODs at Freq. LT 49 HZ. During the week 01-12-06 TO 04-02-07

STATE

No. of Time Blocks for which State

overdrew below 49.5 Hz.

MWH Overdrawal

below 49.5 Hz


below 49.5 Hz

TAMILNADU 4248 257342 242

KARNATAKA 5228 226957 174



GOA 1878 6407 14

KERALA 1524 3443 9

Summary of ODs at Freq. LT 49.5 HZ. During the week 01-12-06 TO 04-02-07

Message Type Brief Details

Type A Caution Message when constituent overdraws at frequency <49.2 Hz. (issued in line with IEGC clause 6.4.4)

Type B Violation Message when constituent overdraws at frequency <49 Hz. (issued in line with IEGC clause 6.4.4)

Type C Violation Message when constituent continues to overdraw at frequency <49.0 Hz., in spite of RLDC’s instruction to terminate the over drawal(issued in line with IEGC clause 6.4.9 and Section 29(2) of I.E. Act 2003)

AVAILABILTY OF GENERATION IN NLC AND NPC STATIONS

NEYVELI TS 2 NEYVELI TPS I (EXP)

NPC, MAPSNPC, KAPS

MONTHSInstalled Capacity (Ex-bus)

Average available generation

(Ex-bus)

Average available

generation (%)

Apr-06 1323 707 53.428

May-06 1323 807 60.967

Jun-06 1323 921 69.590

Jul-06 1323 876 66.194

Aug-06 1323 738 55.795

Sep-06 1323 675 51.008

Oct-06 1323 453 34.275

Nov-06 1323 547 41.369

Dec-06 1323 676 51.096

Jan-07 1323 1028 77.709


Average available generation

(Ex-bus)

Average available generation (%)

Apr-06 380 259 68.271

May-06 380 346 91.132

Jun-06 380 362 95.316

Jul-06 380 323 85.089

Aug-06 380 352 92.550

Sep-06 380 371 97.531

Oct-06 380 248 65.265

Nov-06 380 382 100.494

Dec-06 380 370 97.279

Jan-07 380 356 93.782


Average available

generation (Ex-bus)

Average available

generation (%)

Apr-06 396 251 63.471

May-06 396 273 69.030

Jun-06 396 273 68.848

Jul-06 396 195 49.164

Aug-06 396 183 46.158

Sep-06 396 273 68.862

Oct-06 396 273 68.875

Nov-06 396 228 57.480

Dec-06 396 273 68.888

Jan-07 396 274 69.314

MONTHSInstalled Capacity

(Ex-bus)

Average available generation (Ex-

bus)

Average available generation (%)

Apr-06 396 300 75.854

May-06 396 313 78.981

Jun-06 396 190 48.009

Jul-06 396 203 51.232

Aug-06 396 265 67.030

Sep-06 396 268 67.775

Oct-06 396 265 67.018

Nov-06 396 267 67.372

Dec-06 396 220 55.469

Jan-07 396 256 64.748

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TYPICAL DAY UI IMPORT FROM CENTRAL GRID23rd OCT 2006

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TYPICAL DAY UI IMPORT FROM CENTRAL GRID24th OCT 2006

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TYPICAL DAY UI IMPORT FROM CENTRAL GRID4th FEB 2007

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TYPICAL DAY UI EXPORT TO CENTRAL GRID4th NOV 2006

IR EXCHANGES OF SR IN THE FORM OF UI TILL 04.02.2007 (214 WEEK)

TRANSACTION WITH WR

TRANSACTION WITH ER

Energy Imported

928 MU (IMPORT BY SR)

994 MU(IMPORT BY SR)

Net Saving to each SR and WR/ER Constituents due to

differential tariff

Rs. 86 Cr. Rs. 70 Cr.

Energy Exported 767 MU (EXPORT BY SR)

453 MU(EXPORT BY SR)


differential tariff

Rs. 77 Cr. Rs. 52 Cr.

IR EXCHANGES OF SR IN THE FORM OF UI FROM 03.04.2006 TO 04.02.2007 (44 WEEK)

TRANSACTION WITH WR

TRANSACTION WITH ER

Energy Imported


152 MU(IMPORT BY SR)


differential tariff

Rs. 42 Cr. Rs. 35 Cr.


140 MU(EXPORT BY SR)


differential tariff

Rs. 30 Cr. Rs. 27 Cr.

IR EXCHANGES OF SR IN THE FORM OF UI FROM 02.10.2006 TO 04.02.2007 (18 WEEK)

TRANSACTION WITH WR

TRANSACTION WITH ER

Energy Imported


58 MU(IMPORT BY SR)


differential tariff

Rs. 28 Cr. Rs. 28 Cr.


59 MU(EXPORT BY SR)


differential tariff

Rs. 26 Cr. Rs. 22 Cr.

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Apr-05 May-05 Jun-05 Jul-05 Aug-05 Sep-05 Oct-05 Nov-05 Dec-05 Jan-06 Feb-06 Mar-06

DATE --->

<49.0HZ <49.5HZ <50.0HZ

FREQUENCY SPECTRUM FOR 2005-06

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Apr-05 May-05 Jun-05 Jul-05 Aug-05 Sep-05 Oct-05 Nov-05 Dec-05 Jan-06 Feb-06 Mar-06

DATE --->

>50.2 HZ >50.5 HZ

< 49.0

HZ< 49.5

HZ< 50 HZ

49 - 50.5 HZ

>50.2HZ

>50.5 HZ

Apr-05 0.01 7.81 86.73 99.92 1.00 0.07

May-05 6.37 45.57 95.09 93.61 0.49 0.02

Jun-05 1.91 37.11 91.33 98.06 1.22 0.03

Jul-05 0.28 9.05 69.82 98.36 9.73 1.36

Aug-05 0.06 0.38 22.95 99.03 26.72 0.91

Sep-05 0.00 0.11 5.78 94.38 61.11 5.62

Oct-05 0.00 0.03 3.96 97.47 52.58 2.53

Nov-05 0.12 1.58 21.40 98.24 29.79 1.64

Dec-05 0.20 3.69 52.61 99.75 8.97 0.05

Jan-06 0.08 5.47 73.95 99.87 3.57 0.05

Feb-06 8.55 41.96 97.63 91.39 0.26 0.06

Mar-06 10.24 56.79 96.08 89.68 0.81 0.08

Avg 2.32 17.46 59.78 96.65 16.35 1.04

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FREQUENCY SPECTRUM FROM APRIL 06 TO OCT 06 (UPTO 20TH OCT 06)

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Apr-06 23.7 82.7 98.28 76.2 0.34 0.1

May-06 4.32 51.98 89.79 95.6 2.06 0.08

Jun-06 1.2 8.5 81.06 98.73 3.42 0.06

Jul-06 0.48 8.23 61.89 99.4 6.68 0.11

Aug-06 0.37 6.93 34.82 99.22 22.75 0.41

Sep-06 1.38 29.62 63.95 98.61 12.27 0.02

Oct-06 (upto 20th) 10.54 44.74 83.42 89.47 2.66 0.02

POWER SUPPLY POSITION FOR 2006-07, 2005-06 & 2004-05

MAXIMUM DEMAND MET:

STATE WISE MAXIMUM DEMAND MET:

MW MUs

2006 – 07 (Upto Feb 07) 23,520 523.36

2005 – 06 23,372 517.52

2004 – 05 22,364 481.26

AGENCY 2006 – 07 (MW)

2005 – 06 (MW)

2004 – 05 (MW)

2006 – 07 (MUs)

2005 – 06 (MUs)

2004 – 05 (MUs)

ANDHRA PRADESH

8,281 8,239 7,613 174.68 173.83 166.48

KARNATAKA 5,758 5,558 5,612 130.02 125.76 115.44

KERALA 2,669 2,578 2,420 45.02 43.81 41.05

TAMIL NADU 8,371 8,209 7,473 175.77 172.41 159.14

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