CAISO/WEIM
CAISO Board of GovernorsCalifornia Agencies & LegislatureCalifornia Air Resources Board (CARB)California Energy Commission (CEC)California LegislatureCalifornia Public Utilities Commission (CPUC)EDAMOther CAISO CommitteesWestern Energy Imbalance Market (WEIM)WEIM Governing Body
The California Independent System Operator serves about 80% of California's electricity demand, including the service areas of the state's three investor-owned utilities. It also operates the Western Energy Imbalance Market, an interstate real-time market covering territory that accounts for 80% of the load in the Western Interconnection.
FERC
FERC approved $2.3 million in penalties against Vitol and one of its traders for manipulating CAISO's market in 2013 to limit losses stemming from the firm's congestion revenue rights position.
CAISO
The partial solar eclipse of Oct. 14, 2023, knocked 4,500 MW of solar generation off the CAISO grid — about 1,000 MW more than the reduction seen during the August 2017 total eclipse.
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FERC rejected PG&E's request for an adder to its transmission rates based on its participation in CAISO, finding that California law precludes it from leaving the ISO without the state’s permission.
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Future historians of the U.S. electricity sector one day might conclude the development of an RTO in the West hinged on two separate but interrelated events occurring on one day in July 2023.
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CAISO marked a key milestone in its Western expansion efforts after FERC approved nearly every aspect of its proposed Extended Day-Ahead Market.
Westside Governance Pathways Initiative
The group working to establish a single Western RTO heard summaries of five potential options for a new governing body that could be independent of CAISO.
PG&E
The California PUC approved extending operations at the Diablo Canyon nuclear power plant through 2030.
CAISO
CAISO's Department of Market Monitoring explained that self-scheduled exports to support stressful conditions led to the declaration of emergency alerts in July.
CAISO
CAISO staff and stakeholders again dove into the details of the ISO’s resource adequacy construct, including potentially creating year-ahead requirements and refining the existing capacity procurement mechanism.
TransCanyon LLC
The proposed Cross-Tie transmission project is moving through the federal approval process with a targeted in-service date in 2027.
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