As directed by the Commissioners of the Public Utility Commission of Texas (PUCT) at the PUCT’s January 17, 2019 open meeting, ERCOT has filed an Other Binding Document Revision Request (OBDRR) which is to modify the Operating Reserve Demand Curve (ORDC) to achieve a rightward shift in the Loss of Load Probability (LOLP) curve by 0.25 standard deviations in 2019 and another 0.25 standard deviations in 2020.

The ORDC changes were previously reported by EnergyChoiceMatters.com

ERCOT in the OBDRR stated that, "To effectuate this change, this OBDRR revises the methodology for calculating the probability of reserves falling below the minimum contingency level ('PMBCL') to shift the LOLP by a defined factor “S” multiplied by the standard deviation of the LOLP distribution. This OBDRR proposes to grey-box the change for 2020 until March 1, 2020, consistent with the Commissioners’ directive. With respect to determining the PMBCL and Real-Time Reserve Price Adders, this OBDRR also replaces season and time of day blocks with a blended curve for all seasons and hours, consistent with the Commissioners’ instruction."

See the OBDRR language here

Tags:
ERCOT   Texas   Energy-only  

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