Short-long start unit definitions update

Started: Jan 19, 2022

Daniel Johnson

The California ISO through this initiative is proposing to update the definitions of short and long start units to align with the real-time market horizon. This update will ensure that the real-time market optimization will be able to consider a short start unit’s start-up and minimum run time.


Proposal Development Decision Implementation Completed/Closed
Feb 17, 2022 Draft final proposal posted
Jan 01, 2022 Revised draft tariff language posted
May 23, 2022 FERC approval (ER22-1438)
Mar 24, 2022 Tariff amendment (ER22-1438)
Mar 16, 2022 ISO Board of Governors and WEIM Governing Body approval
Jun 01, 2022 Activation
Implementation milestones