• 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

 
From Date:  
To Date:  
 
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DateBlock NoTimeCutailmentTotal CurtailmentGeneration MWReasons for Backing down
02-09-20193608:45:005050850Demand is low due to festival and weather is rainy(percentage).
02-09-20193609:00:00200200945Demand is low due to festival and weather is rainy.
02-09-20193809:30:002004001011Demand is low due to festival and weather is rainy.
02-09-20194310:40:002006001215Demand is low due to festival and weather is rainy.
02-09-20195613:46:00-2004001040To reduce OD at low frequency LR lifted at Gani
02-09-20196014:56:00-300100888To reduce OD Curtailment lifted at Gani
02-09-20196115:13:00-1000864To reduce OD Curtailment lifted at Gani
02-09-20193608:45:005050850Demand is low due to festival and weather is rainy(percentage).
02-09-20193609:00:00200200945Demand is low due to festival and weather is rainy.
02-09-20193809:30:002004001011Demand is low due to festival and weather is rainy.
02-09-20194310:40:002006001215Demand is low due to festival and weather is rainy.
02-09-20195613:46:00-2004001040To reduce OD at low frequency LR lifted at Gani
02-09-20196014:56:00-300100888To reduce OD Curtailment lifted at Gani
02-09-20196115:13:00-1000864To reduce OD Curtailment lifted at Gani
02-09-20193608:45:005050850Demand is low due to festival and weather is rainy(percentage).
02-09-20193609:00:00200200945Demand is low due to festival and weather is rainy.
02-09-20193809:30:002004001011Demand is low due to festival and weather is rainy.
02-09-20194310:40:002006001215Demand is low due to festival and weather is rainy.
02-09-20195613:46:00-2004001040To reduce OD at low frequency LR lifted at Gani
02-09-20196014:56:00-300100888To reduce OD Curtailment lifted at Gani
02-09-20196115:13:00-1000864To reduce OD Curtailment lifted at Gani
02-09-20197117:38:00-500137relieved at 11 nos solar stations (percent)
03-09-20193207:55:00505047750% BD at 11 Nos Solar power stations(percentage)
03-09-20194310:43:004004001400to reduce UD solar power curtailment at Gani
03-09-20194711:35:00-2002001056To reduce OD solar power released at Gani
03-09-20194811:47:00-2000970to reduce OD solar power released at at Gani
03-09-20196115:10:002002001400to reduce UD Curtailment Issued
03-09-20196215:24:001003001400to reduce UD Curtailment Issued
03-09-20196315:45:00-150150872to reduce UD Curtailment Issued
03-09-20196315:48:00-50087211 Nos Solar power stations generation normalized to reduce OD (percentage)
03-09-20196616:30:00-1500760due to sudden fall in solar to reduce OD
03-09-20193207:55:00505047750% BD at 11 Nos Solar power stations(percentage)
03-09-20194310:43:004004001400to reduce UD solar power curtailment at Gani
03-09-20194711:35:00-2002001056To reduce OD solar power released at Gani
03-09-20194811:47:00-2000970to reduce OD solar power released at at Gani
03-09-20196115:10:002002001400to reduce UD Curtailment Issued
03-09-20196215:24:001003001400to reduce UD Curtailment Issued
03-09-20196315:45:00-150150872to reduce UD Curtailment Issued
03-09-20196315:48:00-50087211 Nos Solar power stations generation normalized to reduce OD (percentage)
03-09-20196616:30:00-1500760due to sudden fall in solar to reduce OD
03-09-20193207:55:00505047750% BD at 11 Nos Solar power stations(percentage)
03-09-20194310:43:004004001400to reduce UD solar power curtailment at Gani
03-09-20194711:35:00-2002001056To reduce OD solar power released at Gani
03-09-20194811:47:00-2000970to reduce OD solar power released at at Gani
03-09-20196115:10:002002001400to reduce UD Curtailment Issued
03-09-20196215:24:001003001400to reduce UD Curtailment Issued
03-09-20196315:45:00-150150872to reduce UD Curtailment Issued
03-09-20196315:48:00-50087211 Nos Solar power stations generation normalized to reduce OD (percentage)
03-09-20196616:30:00-1500760due to sudden fall in solar to reduce OD
04-09-20193709:00:005050816solar power back down at 11 Nos Solar power stations (percentage)
04-09-20193909:45:003003001336To reduce UD SOLAR Back down at Gani
04-09-20194511:02:002005001327To reduce UD SOLAR Back down at Gani
04-09-20194611:26:00-2003001035To reduce OD SOLAR released at Gani
04-09-20195112:32:00-2001001478To reduce OD SOLAR released at Gani
04-09-20195112:42:00-10001291To reduce OD SOLAR released at Gani
04-09-20195613:58:00-500110311 Nos Solar power stations generation normalized to reduce OD (percentage)
04-09-20196215:20:002002001446To reduce UD SOLAR Back down at Ghani
04-09-20196315:37:00-20001080To reduce OD, Generation Normalised
04-09-20196817:00:00100100659to reduce UD to adhere to IEGC regulation
04-09-20196917:15:00-1000447To reduce OD, Generation Normalised
04-09-20193709:00:005050816solar power back down at 11 Nos Solar power stations (percentage)
04-09-20193909:45:003003001336To reduce UD SOLAR Back down at Gani
04-09-20194511:02:002005001327To reduce UD SOLAR Back down at Gani
04-09-20194611:26:00-2003001035To reduce OD SOLAR released at Gani
04-09-20195112:32:00-2001001478To reduce OD SOLAR released at Gani
04-09-20195112:42:00-10001291To reduce OD SOLAR released at Gani
04-09-20195613:58:00-500110311 Nos Solar power stations generation normalized to reduce OD (percentage)
04-09-20196215:20:002002001446To reduce UD SOLAR Back down at Ghani
04-09-20196315:37:00-20001080To reduce OD, Generation Normalised
04-09-20196817:00:00100100659to reduce UD to adhere to IEGC regulation
04-09-20196917:15:00-1000447To reduce OD, Generation Normalised
04-09-20193709:00:005050816solar power back down at 11 Nos Solar power stations (percentage)
04-09-20193909:45:003003001336To reduce UD SOLAR Back down at Gani
04-09-20194511:02:002005001327To reduce UD SOLAR Back down at Gani
04-09-20194611:26:00-2003001035To reduce OD SOLAR released at Gani
04-09-20195112:32:00-2001001478To reduce OD SOLAR released at Gani
04-09-20195112:42:00-10001291To reduce OD SOLAR released at Gani
04-09-20195613:58:00-500110311 Nos Solar power stations generation normalized to reduce OD (percentage)
04-09-20196215:20:002002001446To reduce UD SOLAR Back down at Ghani
04-09-20196315:37:00-20001080To reduce OD, Generation Normalised
04-09-20196817:00:00100100659to reduce UD to adhere to IEGC regulation
04-09-20196917:15:00-1000447To reduce OD, Generation Normalised
05-09-20194009:50:0050501363to reduce UD to adhere to IEGC regulation
05-09-20194310:33:002002001665to reduce UD to adhere to IEGC regulation
05-09-20194410:58:001003001642to reduce UD to adhere to IEGC regulation
05-09-20194811:51:00-1002001449To meet increasing demand
05-09-20195012:16:00-20001494To reduce OD SOLAR released at Gani
05-09-20195012:16:00-500149411 Nos Solar power stations generation normalized to reduce OD (percentage)
05-09-20195212:54:002002001647To reduce UD SOLAR Back down at Ghani
05-09-20195714:06:00-1001001437To reduce over drawl
05-09-20195914:46:00-10001466To reduce over drawl as CGS share is coming down
05-09-20194009:50:0050501363to reduce UD to adhere to IEGC regulation
05-09-20194310:33:002002001665to reduce UD to adhere to IEGC regulation
05-09-20194410:58:001003001642to reduce UD to adhere to IEGC regulation
05-09-20194811:51:00-1002001449To meet increasing demand
05-09-20195012:16:00-20001494To reduce OD SOLAR released at Gani
05-09-20195012:16:00-500149411 Nos Solar power stations generation normalized to reduce OD (percentage)
05-09-20195212:54:002002001647To reduce UD SOLAR Back down at Ghani
05-09-20195714:06:00-1001001437To reduce over drawl
05-09-20195914:46:00-10001466To reduce over drawl as CGS share is coming down
05-09-20194009:50:0050501363to reduce UD to adhere to IEGC regulation
05-09-20194310:33:002002001665to reduce UD to adhere to IEGC regulation
05-09-20194410:58:001003001642to reduce UD to adhere to IEGC regulation
05-09-20194811:51:00-1002001449To meet increasing demand
05-09-20195012:16:00-20001494To reduce OD SOLAR released at Gani
05-09-20195012:16:00-500149411 Nos Solar power stations generation normalized to reduce OD (percentage)
05-09-20195212:54:002002001647To reduce UD SOLAR Back down at Ghani
05-09-20195714:06:00 1001437To reduce over drawl
05-09-20195914:46:00 01466To reduce over drawl as CGS share is coming down
06-09-20194110:02:002002001502To reduce UD SOLAR Back down at Ghani
06-09-20194110:05:0050501502To control UD solar power back down at 11 Nos Solar power stations (percentage)
06-09-20194611:30:00-1001001221To reduce over drawl as CGS share is coming down
06-09-20194811:49:00-10001380To reduce over drawl as CGS share is coming down
06-09-20195112:40:00-5001354To reduce over drawl of 288MW, Generation Normalised
06-09-20194110:02:002002001502To reduce UD SOLAR Back down at Ghani
06-09-20194110:05:0050501502To control UD solar power back down at 11 Nos Solar power stations (percentage)
06-09-20194611:30:00-1001001221To reduce over drawl as CGS share is coming down
06-09-20194811:49:00-10001380To reduce over drawl as CGS share is coming down
06-09-20195112:40:00-5001354To reduce over drawl of 288MW, Generation Normalised
06-09-20194110:02:002002001502To reduce UD SOLAR Back down at Ghani
06-09-20194110:05:0050501502To control UD solar power back down at 11 Nos Solar power stations (percentage)
06-09-20194611:30:00-1001001221To reduce over drawl as CGS share is coming down
06-09-20194811:49:00-10001380To reduce over drawl as CGS share is coming down
06-09-20195112:40:00-5001354To reduce over drawl of 288MW, Generation Normalised
07-09-20194310:40:001004001085Wind curtailed 100%as we are under drawing CGS share continuously. For sign change in CGS share Solar curtailed.
07-09-20194511:07:00-1003001057To reduce over drawl for CGS share
07-09-20194711:36:00-1002001093To reduce over drawl for CGS share
07-09-20195814:30:00-20001000DEMAND RISING
07-09-20193207:55:005050516Solar power is in rising trend. From 33 block suddenly CGS share increased as technical minimum allotted by SRLDC in all CGS stations(percentage), Hence Solar Curtailment Issued
07-09-20193308:02:00200200551Solar power is in rising trend. From 33 block suddenly CGS share increased as technical minimum allotted by SRLDC in all CGS stations(percentage), Hence Solar Curtailment Issued
07-09-20194009:54:00100300969Solar power is in rising trend. Demand is falling due to rains at various parts of the state. To control under drawl Solar generation curtailed
07-09-20196014:45:00-500796DEMAND RISING (percentage)`
07-09-20194310:40:001004001085Wind curtailed 100%as we are under drawing CGS share continuously. For sign change in CGS share Solar curtailed.
07-09-20194511:07:00-1003001057To reduce over drawl for CGS share
07-09-20194711:36:00-1002001093To reduce over drawl for CGS share
07-09-20195814:30:00-20001000DEMAND RISING
07-09-20196014:45:00-500796DEMAND RISING (percentage)`
07-09-20193207:55:005050516Solar power is in rising trend. From 33 block suddenly CGS share increased as technical minimum allotted by SRLDC in all CGS stations(percentage), Hence Solar Curtailment Issued
07-09-20193308:02:00200200551Solar power is in rising trend. From 33 block suddenly CGS share increased as technical minimum allotted by SRLDC in all CGS stations(percentage), Hence Solar Curtailment Issued
07-09-20194009:54:00100300969Solar power is in rising trend. Demand is falling due to rains at various parts of the state. To control under drawl Solar generation curtailed
07-09-20194310:40:001004001085Wind curtailed 100%as we are under drawing CGS share continuously. For sign change in CGS share Solar curtailed.
07-09-20194511:07:00 3001057To reduce over drawl for CGS share
07-09-20193207:55:005050516Solar power is in rising trend. From 33 block suddenly CGS share increased as technical minimum allotted by SRLDC in all CGS stations(percentage), Hence Solar Curtailment Issued
07-09-20193308:02:00200200551Solar power is in rising trend. From 33 block suddenly CGS share increased as technical minimum allotted by SRLDC in all CGS stations(percentage), Hence Solar Curtailment Issued
07-09-20194009:54:00100300969Solar power is in rising trend. Demand is falling due to rains at various parts of the state. To control under drawl Solar generation curtailed
07-09-20194711:36:00 2001093To reduce over drawl for CGS share
07-09-20195814:30:00 01000DEMAND RISING
07-09-20196014:45:00-500796DEMAND RISING (percentage)`
08-09-20193207:58:005050505Solar generation in rising trend. Demand is falling. To control under drawl at high frequency solar generation curtailed (percentage).
08-09-20193308:02:00200200503Solar generation in rising trend. Demand is falling. To control under drawl at high frequency solar generation curtailed.
08-09-20193608:56:00100300756Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20193709:05:003080928Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20194110:11:002005001212Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20194711:39:00 4001069To reduce over drawl solar curtailment released partially as demand forecast again falling.
08-09-20195212:49:001005001254Demand falling and solar generation rising.
08-09-20195413:25:00 4001060DEMAND RISING
08-09-20196215:25:00 200800DEMAND RISING
08-09-20196315:42:00 0630DEMAND RISING
08-09-20196315:45:00-500585DEMAND RISING (percentage)
08-09-20193207:58:005050505Solar generation in rising trend. Demand is falling. To control under drawl at high frequency solar generation curtailed (percentage).
08-09-20193308:02:00200200503Solar generation in rising trend. Demand is falling. To control under drawl at high frequency solar generation curtailed.
08-09-20193608:56:00100300756Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20193709:05:003080928Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20194110:11:002005001212Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20194711:39:00-1004001069To reduce over drawl solar curtailment released partially as demand forecast again falling.
08-09-20195212:49:001005001254Demand falling and solar generation rising.
08-09-20195413:25:00-1004001060DEMAND RISING
08-09-20196215:25:00-200200800DEMAND RISING
08-09-20196315:42:00-2000630DEMAND RISING
08-09-20196315:45:00-500585DEMAND RISING (percentage)
08-09-20193207:58:005050505Solar generation in rising trend. Demand is falling. To control under drawl at high frequency solar generation curtailed (percentage).
08-09-20193308:02:00200200503Solar generation in rising trend. Demand is falling. To control under drawl at high frequency solar generation curtailed.
08-09-20193608:56:00100300756Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20193709:05:003080928Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20194110:11:002005001212Surrendered our share in all CGS stations. Eventhough CGS share increased due to allotment of technical minimum share in Simhadri I, II, Ramagundam !,7, Talcher & TPCIL
08-09-20194711:39:00-1004001069To reduce over drawl solar curtailment released partially as demand forecast again falling.
08-09-20195212:49:001005001254Demand falling and solar generation rising.
08-09-20195413:25:00-1004001060DEMAND RISING
08-09-20196215:25:00-200200800DEMAND RISING
08-09-20196315:42:00-2000630DEMAND RISING
08-09-20196315:45:00-500585DEMAND RISING (percentage)
09-09-20193308:10:00200200913to reduce UD to adhere to IEGC regulation
09-09-20193508:40:0050501123to reduce UD to adhere to IEGC regulation (percentage)
09-09-20194310:30:00-1001001494DEMAND RISING
09-09-20194410:45:00-10001510DEMAND RISING
09-09-20194811:53:00-5001680DEMAND RISING (percentage)