Ancillary service state of charge constraint

Started: Sep 19, 2022

Daniel Johnson

This initiative will address compensation for storage resources providing ancillary services. All resources are required to be able to fully provide ancillary services awarded in the day-ahead and real-time markets for specified periods of time. Storage resources have an additional constraint to enforce this requirement in the real-time market, which can result in uneconomic energy awards.  Appropriate compensation will be considered when these conditions exist.


Proposal Development Decision Implementation Completed/Closed
Nov 18, 2022 FERC approval (ER22-2881)
Sep 19, 2022 Tariff amendment (ER22-2881)
Summer 2023
Jul 01, 2023 Activation, retroactive to TD 9/20/22 (Short-term fix)
Implementation milestones



Web meeting

Market Surveillance Committee meeting