This initiative will examine moving the final base schedule submission for the operating hour to T-30. Current financially binding base schedules are finalized at T-40. This later submission deadline will ideally increase market efficiency due to more accurate modeling of physical flows in the 15-minute market. In this same initiative the ISO is also proposing to examine updating tariff rules and market system to allow for base schedules to include energy below a resources minimum load. This proposed modification will allow entities to more accurately capture the startup energy.
| Proposal Development | Decision | Implementation | Completed/Closed | |
|---|---|---|---|---|
| Phase 2 | Closed | |||
| Phase 1 |
Nov 05, 2020 Draft final proposal posted
Dec 11, 2020 Revised draft tariff language posted |
Sep 25, 2023 FERC approval (ER23-2505)
Jul 28, 2023 Removal of submission deadline revisions (ER23-2505/ER21-955) Jul 19, 2023 Joint ISO Board of Governors and WEIM Governing Body approval Apr 30, 2021 FERC approval in part/rejection in part (ER21-955) Mar 25, 2021 Amendment to tariff changes (ER21-955) Jan 27, 2021 Tariff amendment filing (ER21-955) Dec 17, 2020 Board of Governors approval Dec 02, 2020 Western EIM Governing Body approval |
Phase 2:
Spring 2022 Deployment Spring 2022 Activation Phase 1: May 01, 2021 Deployment May 2021 Activation Outcome statement: The Phase 1 implementation includes the inclusion of startup energy below a resource's minimum load: - include startup energy in a WEIM base schedule o include startup energy in the resource sufficiency evaluation o reduction of imbalance energy settlement The Phase 2 scope will not be implemented: - Updates to the base schedule submission timeline o move markt closure for the final binding WEIM base schedule submission from T-40 to T-30 ~ Adding additional RSE at T-40 |
Completed |
Phase 1 Outcome:
The ISO deployed EIM Base Schedule Submission Deadline (BSSD) Phase 1 on November 1, 2021. EIM BSSD Phase 1 enabled Real-Time Market support for base schedules below minimum load (Pmin), EDR capture of base schedules below Pmin, MQS calculate of expected energy on the base schedules below Pmin, and BSAP support for startup energy to be submitted (anything below Pmin). This proposed modification will allow CAISO and EIM Entities to more accurately capture the startup energy of large conventional resources within their Resource Sufficiency Evaluations (RSE), thus increasing their ability to pass the RSE while lowering their exposure to uninstructed imbalance energy settlement