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INITIATIVE:
WEIM resource sufficiency evaluation enhancements

Joint Authority
Started: May 25, 2021

Leads
Danny Johnson

Phase 1 of this initiative examines the design and implementation of the current Western Energy Imbalance Market (WEIM) resource sufficiency evaluation (RSE). This initiative will review the balancing, capacity, and flexible ramping tests to determine if any enhancements are needed to ensure the test components achieve their stated objective.  In addition, this initiative will clarify what constitutes leaning, as well as determine appropriate consequences for a failure of the RSE.  

Phase 1B of this initiative enhances the accuracy and equitable application of the WEIM resource sufficiency evaluation (RSE). The phase 1B enhancements aim to resolve outstanding concerns regarding the accuracy of the RSE that were raised by stakeholders in the phase 1 initiative.  As part of the phase 1B initiative, the ISO will analyze the impact of load conformance on WEIM transfers, the interplay of WEIM transfers with hourly block exports, and the performance of the methodology to estimate uncertainty requirements. 

Relevant notices Contact us

Status

Proposal Development Decision Implementation Completed/Closed
Mar 08, 2023 Final revised draft tariff language posted
Nov 07, 2022 Revised final proposal posted
Dec 14, 2022 Joint WEIM Governing Body and Board of Governors approval
Sep 14, 2022 FERC Order accepting compliance filing (ER22-1278)
Jun 07, 2022 Compliance filing (ER22-1278)
May 27, 2022 FERC approval (ER22-1278)
Mar 11, 2022 Tariff amendment filing (ER22-1278)
Feb 09, 2022 ISO Board of Governors approval - phase 1
Feb 02, 2022 Market Surveillance Committee opinion adopted - phase 1
Summer 2023 Implementation - phase 2
Jun 01, 2022 Implementation - phase 1
Implementation milestones

Activities

Final revised draft tariff language

Final Revised Draft Tariff Language - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 03/07/2023

ISO Response Matrix - Revised Draft Tariff Language - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 03/07/2023

Web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 - Jan 11, 2023 01/12/2023

Revised Draft Tariff Language - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 12/12/2022

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Second Revised Final Proposal - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 12/06/2022


Notice of Decisional Classification - Resource Sufficiency Evaluation Enhancements Phase 2 - Addendum - Nov 30, 2022 12/01/2022

Notice of Decisional Classification - Resource Sufficiency Evaluation Enhancements Phase 2 - Oct 10, 2022 12/01/2022

Web meeting

Market Surveillance Committee meeting

Agenda - Market Surveillance Committee Meeting - Nov 21, 2022 11/16/2022

Web meeting


Presentation - Resource Sufficiency Evaluation Phase 2 - Nov 7, 2022 11/07/2022

Revised Final Proposal - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 11/07/2022

Video - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 - Nov 7, 2022 11/08/2022

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Web meeting

Market Surveillance Committee meeting

MSC Draft Opinion on WEIM Resource Sufficiency Evaluation Enhancements - Phase 2 10/17/2022

Web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Oct 6, 2022 10/07/2022

Final Proposal - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 10/03/2022

Web meeting

Market Surveillance Committee meeting

Presentation - Resource Sufficiency Evaluation Phase 2 - Sep 19, 2022 09/19/2022

Web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Sep 15, 2022 09/20/2022

Draft Tariff Language - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 09/02/2022

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FERC order accepting compliance filing

Sep 14, 2022 Order Accepting Resource Sufficiency Evaluation Enhancements Compliance Filing (ER22-1278) 09/19/2022

Web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Sep 2, 2022 09/07/2022

Revised Draft Final Proposal - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 09/07/2022

Presentation - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 - Sep 2, 2022 09/01/2022

Draft Final Proposal - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 08/25/2022

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Phase 2 web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Jul 11, 2022 07/14/2022

Presentation - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 - Jul 11, 2022 07/11/2022

Straw Proposal - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 07/01/2022

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Compliance filing

Jun 7, 2022 Compliance Filing - Resource Sufficiency Evaluation Enhancements (ER22-1278) 09/19/2022

Phase 1B web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Jun 28, 2022 06/29/2022

Presentation - WEIM Resource Sufficiency Evaluation Enhancements Phase 1B - Jun 28, 2022 06/27/2022

Final Analysis Report - WEIM Transfers, Hourly Interties and Load 06/21/2022

Final Analysis Report - Flexible Ramping and Intertie Deviation Uncertainty in the WEIM 06/21/2022

FERC approval (phase 1)

May 27, 2022 Order Accepting Resource Sufficiency Evaluation Enhancements (ER22-1278) 06/02/2022

Phase 1B web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - May 3, 2022 05/11/2022

Presentation - WEIM Resource Sufficiency Evaluation Enhancements - May 3, 2022 05/02/2022

Analysis Report - Intertie Deviation - WEIM Resource Sufficiency Evaluation Enhancements Final Analysis 04/26/2022

Analysis Report - Interaction of Hourly Intertie Schedules and Transfers - WEIM Resource Sufficiency Evaluation Enhancements 04/26/2022

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Phase 1B web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Apr 1, 2022 04/05/2022

Presentation - Flexible Ramping Uncertainty Calculation in the Western Energy Imbalance Market (WEIM) - Apr 1, 2022 03/31/2022

Presentation - Load Conformance Impact on the Resource Sufficiency Evaluation - Apr 1, 2022 03/31/2022

Analysis Report - Load Conformance Impact on Resource Sufficiency Evaluation 03/25/2022

Analysis Report - Flexible Ramping Uncertainty Calculation in the Western Energy Imbalance Market 03/25/2022

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Phase 1 web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Emergency Assistance Workshop - Mar 23, 2022 03/28/2022

Presentation - WEIM Resource Sufficiency Evaluation Enhancements - Emergency Actions Criteria - Mar 23, 2022 03/22/2022

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Tariff amendment (phase 1)

Mar 11, 2022 Tariff Amendment - Resource Sufficiency Evaluation Enhancements (ER22-1278) 06/02/2022

Phase 1 web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements - Mar 7, 2022 03/11/2022

Final Draft Tariff Language - WEIM Resource Sufficiency Evaluation Enhancements 03/03/2022

Phase 1 web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements Phase 1 - Emergency Actions Criteria Workshop - Feb 23, 2022 03/08/2022

Presentation - WEIM Resource Sufficiency Evaluation Enhancements Phase 1 - Emergency Actions Criteria Workshop - Feb 23, 2022 02/23/2022

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Phase 1B web meeting

Video - WEIM Resource Sufficiency Evaluation Enhancements Phase 1B - Feb 16, 2022 02/22/2022

Presentation - WEIM Resource Sufficiency Evaluation Enhancements Phase 1B - Feb 16, 2022 02/14/2022

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Phase 1 web meeting

Revised Draft Tariff Language - WEIM Resource Sufficiency Evaluation Enhancements 03/01/2022
Revisions to this version are based on stakeholder comments received on draft tariff language on Jan. 25, 2022.

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Notice of Decisional Classification - Resource Sufficiency Evaluation Enhancements 01/24/2022

Phase 1 web meeting

Audio - WEIM Resource Sufficiency Evaluation Enhancements - Feb 4, 2022 02/14/2022

Draft Tariff Language - EIM Resource Sufficiency Evaluation Enhancements 01/18/2022

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Phase 1 web meeting

Presentation - EIM Resource Sufficiency Evaluation Enhancements - Dec 21, 2021 12/21/2021

Revised Draft Final Proposal - EIM Resource Sufficiency Evaluation Enhancements 12/16/2021

Video - EIM Resource Sufficiency Evaluation Enhancements - Dec 21, 2021 01/05/2022

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Phase 1 web meeting

Video - EIM Resource Sufficiency Evaluation Enhancements - Dec 8, 2021 12/13/2021

Presentation - EIM Resource Sufficiency Evaluation Enhancements - Dec 8, 2021 12/07/2021

Resource Sufficiency Evaluation Analysis - Jul 9, 2021 Performance 12/02/2021

Phase 1 web meeting

Market Surveillance Committee meeting - Nov 19, 2021 11/18/2021

Phase 1 web meeting

Video - EIM Resource Sufficiency Evaluation Enhancements - Oct 12, 2021 10/15/2021

Presentation - Resource Sufficiency Evaluation Enhancements - Oct 12, 2021 10/08/2021

Draft Final Proposal - EIM Resource Sufficiency Evaluation Enhancements 10/08/2021

Analysis of the Intertie Deviation Adder Used in the Capacity Test 10/06/2021

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Phase 1 web meeting

Market surveillance committee meeting - Aug 27,2021 08/23/2021

Phase 1 web meeting

Video - EIM Resource Sufficiency Evaluation Enhancements - Aug 23, 2021 08/25/2021

Straw Proposal - EIM Resource Sufficiency Evaluation Enhancements 08/25/2021
Updated proposal includes a clarification to paragraph 2 in section 4.2.3

Presentation - EIM Resource Sufficiency Evaluation Enhancements - Aug 23, 2021 09/10/2021

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Phase 1 web meeting

This is day 2 of the workshop to discuss the issue paper posted on May 28, 2021. The issue paper and workshop presentations are posted as part of the June 25 activity below.

Video - Western EIM Resource Sufficiency Evaluation Enhancements Workshop - Jun 28, 2021 06/30/2021

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Phase 1 web meeting

Video - Western EIM Resource Sufficiency Evaluation Enhancements Workshop - Jun 25, 2021 06/30/2021

CAISO Presentation - EIM RSE Enhancements Workshop - Jun 25 and 28, 2021 06/24/2021

PGE Presentation - EIM RSE Enhancements Workshop - Jun 25 and 28, 2021 (Uncertainty in the Capacity Test) 06/25/2021

Joint EIM Entity Combined Presentation - EIM RSE Enhancements Workshop - Jun 25 and 28, 2021 06/23/2021

Joint EIM Presentation - EIM RSE Enhancements Workshop - Jun 25 and 28, 2021 (Topics and Principles) 06/23/2021

Joint EIM Entity Presentation - EIM RSE Enhancements Workshop - Jun 25 and 28, 2021 (Specific Enhancements to Improve RSE Accuracy) 06/23/2021

Joint EIM Entity Presentation - EIM RSE Enhancements Workshop - Jun 25 and 28, 2021 (Enhanced Transparency, Reporting and Oversight) 06/23/2021

Joint EIM Entity Presentation - EIM RSE Enhancements Workshop - Jun 25 and 28, 2021 (Failure Consequences) 06/23/2021

Issue Paper - EIM Resource Efficiency Evaluation Enhancements 06/03/2021