INITIATIVE:
Western EIM base schedule submission deadline

Started: Sep 23, 2020

Leads
Daniel Johnson

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.

Status

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

Phase 2

Closed

Phase 1

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

Filing



Notice of Decisional Classification - Withdrawal of WEIM Base Schedule Submission Timeline Changes - Jul 2023

Web meeting


Presentation - WEIM Base Schedule Submission Deadline - Jun 15, 2023

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Notice of Decisional Classification - Western EIM Base Schedule Submission Deadline

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Revised Draft Tariff Language - Western EIM Base Schedule Submission Deadline

Draft Tariff Language - Western EIM Base Schedule Submission Deadline

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Web meeting


Presentation - Western EIM Base Schedule Submission Deadline Draft Final Proposal - Nov 6, 2020

Draft Final Proposal - Western EIM Base Schedule Submission Deadline
Updated Nov 5, 2020

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Web meeting


Presentation - Western EIM Base Schedule Submission Deadline - Sep 30, 2020

IssuePaper/StrawProposal - Western EIM Base Schedule Submission Deadline

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