This Planning Guide Revision Request (PGRR) would ensure that a planning study would not consider a congestion problem “solved” if that solution required a dispatchable resource to be dispatched below a certain output threshold. There was some confusion about what the “minimum duration threshold” referenced in the PGRR actually meant. (It means that if an ESR meets that duration threshold it cannot be dispatched below its output threshold to resolve a congestion problem in a planning study.) The PGRR was passed with an output threshold of 100% and an undefined battery duration threshold.
- 8/26/2021 ERCOT introduces PGRR095
- 2/23/22 TAC passes PGRR with an output threshold of 100%; no duration threshold for batteries was decided upon at this meeting.
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