The California ISO has revised the operating procedure referenced below.
2720 Market Disruption - Western Energy Imbalance Market (WEIM), version 4.4, effective Aug. 4, 2022.
Updated Scenario 1-D to be named “High Impact Schedule Maintenance/Enhancement.” Added change in procedure that DB Model Builds do to not require Energy Transfer System Resource (ETSR) limitations by default, unless the Manager, Market Coordination requests after an impact assessment. Changed Customer Service’s Notification process in 1-D; Updated Scenario 3-B with lesson-learned items from the Bonneville Power Administration (BPA) Unplanned Market Isolation Simulation. Updated all instances of EIM to WEIM and updated title spelling out Western Energy Imbalance Market (WEIM).
Removed history prior to five years.
The California ISO’s operating procedures are available on the Operating Procedures webpage.
