• The backing down of wind and solar generation is done after giving instructions to all thermal generators for backing down upto technical limits.
  • The following are relavent regulatory clauses for backing down.
  • Compendium of CERC(DSM Regulations) clause 7.1 The over drawl/Under drawl by any buyer shall not exceed 250MWfor renewable rich state.
  • compendium of CERC(IEGC) Regulations clause 5.4.2(a) SLDC/SEB/Discom shall intiate action to restrict the drawl of its control area, from the Grid within the drawl schedule.
  • compendium of CERC(IEGC) Regulations clause 5.2.(m) all SEBs,SLDCs,RLDCs and NLDC shall take all possible measures to ensure that Grid frequency remains with in (49.90Hz-50.05Hz) the band.

Following are the instructions issued from SLDC for curtailment of wind generation with written justification

 
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DateBlock NoTimeSolar cutailment MWTotal Solar CurtailmentSolar generation MWReasons for Backing down
14-01-20204110:25:0050501745Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
14-01-20204411:02:001501501746Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20204611:26:001002501617Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20204912:02:001003501538Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20205212:47:002005501446Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20205212:47:001001001446Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
14-01-20205212:53:001002001294Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
14-01-20205212:57:00501001190Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
14-01-20205513:40:00100300909Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
14-01-20205513:40:00150150909Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
14-01-20205714:10:00-200350657Released to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20205714:10:00-100200657Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS )
14-01-20205714:10:00-10050657Released to maintain grid security as per IEGC regulation (At Mylavaram SS)
14-01-20205714:10:00-5050657Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
14-01-20205914:40:002005501158Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20205914:40:001003001158Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
14-01-20206115:05:00100650908Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20206115:05:0050350908Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
14-01-20206115:05:0050100908Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
14-01-20206616:19:00200850639Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20206716:44:00-1000377Released to maintain grid security as per IEGC regulation (At Mylavaram SS)
14-01-20206716:44:00-150200377Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS )
14-01-20206816:48:00-200650391Released to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20206816:50:00-2000409Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS )
14-01-20206816:50:00-250400409Released to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20206917:10:00-4000307Released to maintain grid security as per IEGC regulation (At Ghani SS)
14-01-20206917:10:00-500307Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
15-01-20203809:25:0050501350Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
15-01-20203909:30:002002001380Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
15-01-20204009:45:001001001256Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
15-01-20204009:45:002004001256Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
15-01-20204210:21:001002001154Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
15-01-20204310:40:002006001072Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
15-01-20204310:40:00501001072Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
15-01-20204811:55:00100700861Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
15-01-20204912:00:00100100860Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
15-01-20205513:38:0050250683Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
15-01-20205513:38:00150850683Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
15-01-20205914:41:0050150479Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
15-01-20206415:56:00100950457Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
15-01-20207117:41:00-950083Released to maintain grid security as per IEGC regulation (At Ghani SS)
15-01-20207117:41:00-250083Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS )
15-01-20207117:41:00-150083Released to maintain grid security as per IEGC regulation (At Mylavaram SS)
15-01-20207117:41:00-100083Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
16-01-20203608:52:0050501123Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
16-01-20203709:00:002002001198Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20203709:00:001001001198Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
16-01-20204009:46:002004001140Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20204009:46:001002001140Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
16-01-20204009:46:00501001140Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
16-01-20204711:39:00-100100855Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS )
16-01-20204912:06:00-5050982Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
16-01-20205212:56:00501001199Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
16-01-20205212:56:002006001199Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20205313:01:001002001169Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
16-01-20205313:01:001001001169Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
16-01-20205714:00:00100700763Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20205714:00:0050150763Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
16-01-20206115:12:00-100600485Released to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20206115:12:00-100100485Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
16-01-20206115:12:00-10050485Released to maintain grid security as per IEGC regulation (At Mylavaram SS)
16-01-20206415:50:00100700780Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20206415:50:0050150780Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
16-01-20206415:50:0050100780Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
16-01-20206516:05:00100800780Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20206516:05:0050200780Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
16-01-20206516:05:0050150780Curtailed to maintain grid security as per IEGC regulation (At Mylavaram SS)
16-01-20206917:10:00-300500288Released to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20206917:10:00-15050288Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
16-01-20206917:10:00-1500288Released to maintain grid security as per IEGC regulation (At Mylavaram SS)
16-01-20207017:20:00-1000226Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
16-01-20207017:20:00-5000226Released to maintain grid security as per IEGC regulation (At Ghani SS)
16-01-20207017:20:00-500226Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
17-01-20203709:01:002002001155Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20203709:01:001001001155Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
17-01-20203809:15:00-1001001050Released to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20203809:25:00-10001113Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
17-01-20203809:29:00-10001144Released to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20204010:00:002002001613Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20204010:00:001001001613Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
17-01-20204411:01:002004001514Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20204411:01:0050501514Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
17-01-20204912:10:00-10001247Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
17-01-20204912:10:00-2002001247Released to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20205413:21:003005001570Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20205613:50:001501501260Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
17-01-20205613:52:002007001260Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20205814:29:00-1500929Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
17-01-20205914:39:00-300400975Released to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20206115:12:00-2002001247Released to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20206215:16:00-20001247Released to maintain grid security as per IEGC regulation (At Ghani SS)
17-01-20206315:32:00-5001184Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
18-01-20204110:04:004004001400Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
18-01-20204110:06:0050501411Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
18-01-20204110:06:001501501411Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
18-01-20204511:02:002006001101Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
18-01-20205212:51:00100700976Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
18-01-20205212:51:00100250976Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
18-01-20206215:23:00-2500776Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
18-01-20206315:31:00-300400754Released to maintain grid security as per IEGC regulation (At Ghani SS)
18-01-20206315:45:00-4000732Released to maintain grid security as per IEGC regulation (At Ghani SS)
18-01-20206616:16:00-500597Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
19-01-20204310:40:001501501819Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
19-01-20204410:54:001002501703Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
19-01-20204511:03:001003501639Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
19-01-20204511:08:0050501621Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
19-01-20204611:23:001001001570Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
19-01-20204711:31:001004501542Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
19-01-20205012:17:00-10001342Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
19-01-20205413:22:00501001469Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
19-01-20205413:27:002002001425Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
19-01-20205613:46:001005501169Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
19-01-20205814:25:00-2000875Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
19-01-20206014:53:00-10001017Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
19-01-20206215:25:00-2003501050Released to maintain grid security as per IEGC regulation (At Ghani SS)
19-01-20206315:37:00-1502001055Released to maintain grid security as per IEGC regulation (At Ghani SS)
19-01-20206315:41:00-20001032Released to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20204009:56:002002001566Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20204110:11:00-1001001480Released to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20204310:31:00-10001675Released to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20204611:25:002002001936Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20204611:30:001001001881Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
20-01-20204611:30:0050501881Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
20-01-20204912:14:00-10001696Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
20-01-20205613:53:002004001612Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20205714:10:00-1003001399Released to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20205814:16:00-1002001476Released to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20205914:31:00-20001520Released to maintain grid security as per IEGC regulation (At Ghani SS)
20-01-20206014:56:00-5001502Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
21-01-20204310:31:001001001835Curtailed to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
21-01-20204511:08:001001001715Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
21-01-20204711:31:001502501615Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
21-01-20205012:27:002004501424Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
21-01-20205313:01:002006501215Curtailed to maintain grid security as per IEGC regulation (At Ghani SS)
21-01-20205313:06:001001001207Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
21-01-20205614:00:00100200910Curtailed to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
21-01-20205914:31:00-200450807Released to maintain grid security as per IEGC regulation (At Ghani SS)
21-01-20206115:13:00-100100918Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
21-01-20206115:13:00-5050918Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
21-01-20206516:13:00-1000994Released to maintain grid security as per IEGC regulation (At Talaricheruvu SS)
21-01-20206616:15:00-200250976Released to maintain grid security as per IEGC regulation (At Ghani SS)
21-01-20206616:15:00-500976Released to maintain grid security as per IEGC regulation (At distributed Solar in percentage )
21-01-20206716:33:00-2500812Released to maintain grid security as per IEGC regulation (At Ghani SS)