Currently, the WRAP Loss of Load Expectation (LOLE) model includes an additional 6% of load as a proxy for the 3% load/3% generation Contingency Reserve (CR) requirement established under BAL-002-WECC-3. This additional load is modeled in the same manner as other load, meaning that a loss of contingency reserves is treated as a “loss of load.” Based on modeling experience, the Program Operator estimates that this treatment increases the Forward Showing Planning Reserve Margin (FSPRM) by approximately 4%.
FERC approved the retirement of BAL-002-WECC-3 on April 14, 2026, with the retirement becoming effective July 1, 2026. Following its retirement, the Western Power Pool (WPP) Reserve Sharing Group (RSG) established a new CR methodology. Under the new methodology, the RSG footprint must carry CR equal to 200% of the previous calendar year’s average Most Severe Single Contingency (MSSC). The total RSG CR requirement is allocated to individual Balancing Authorities (BAs) based on each BA’s weighted pro rata share of generation plus load relative to total generation plus load across the RSG footprint.
WRAP seeks to implement this updated policy expeditiously to ensure Participants are able to plan to meet these new regulations. This proposal was previously posted as a Non-Task Force Proposal (NTFP0-07) but has been reworked into the following Expedited Proposal (EP-07). For ease of review, relevant changes and adds have been highlighted to ensure reviewers can track the updates made with this process change.
Comment Topic
Overview
Currently, the WRAP Loss of Load Expectation (LOLE) model includes an additional 6% of load as a proxy for the 3% load/3% generation Contingency Reserve (CR) requirement established under BAL-002-WECC-3. This additional load is modeled in the same manner as other load, meaning that a loss of contingency reserves is treated as a “loss of load.” Based on modeling experience, the Program Operator estimates that this treatment increases the Forward Showing Planning Reserve Margin (FSPRM) by approximately 4%.
FERC approved the retirement of BAL-002-WECC-3 on April 14, 2026, with the retirement becoming effective July 1, 2026. Following its retirement, the Western Power Pool (WPP) Reserve Sharing Group (RSG) established a new CR methodology. Under the new methodology, the RSG footprint must carry CR equal to 200% of the previous calendar year’s average Most Severe Single Contingency (MSSC). The total RSG CR requirement is allocated to individual Balancing Authorities (BAs) based on each BA’s weighted pro rata share of generation plus load relative to total generation plus load across the RSG footprint.
WRAP seeks to implement this updated policy expeditiously to ensure Participants are able to plan to meet these new regulations. This proposal was previously posted as a Non-Task Force Proposal (NTFP0-07) but has been reworked into the following Expedited Proposal (EP-07). For ease of review, relevant changes and adds have been highlighted to ensure reviewers can track the updates made with this process change.
Response Guide
Prompts
Responses
Comments Received
Camille C. / Idaho Power Compa…
Idaho Power supports the proposal to update the WRAP contingency reserve methodology to a…