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.
Stakeholders said they are inching closer to developing the scenarios that will inform the Western Transmission Expansion Coalition’s transmission planning study.
FERC approved CAISO’s request to further streamline its generator interconnection process in response to the high volume of requests in its interconnection queue.
CAISO kicked off a new Storage Design and Modeling Initiative intended to tackle an array of challenges related to the growing market participation of storage resources.
CAISO's Department of Market Monitoring reported that the ISO saw “one of the highest demand peaks” in recent years in 2024.
FERC approved fines on Sonoran West Solar Holdings for submitting misleading initial state of charge values that led to undue bid cost recovery payments.
The West-Wide Governance Pathways Initiative still grapples with political uncertainties and governance concerns despite efforts to fix those issues, proponents of SPP’s Markets+ contended.
CAISO is considering how to apply fast-start pricing to the Extended-Day Ahead Market — a topic that has been a sticking point for some as entities across the West decide which day-ahead market to join.
Stakeholders urged the Bonneville Power Administration to provide more transparency regarding the agency’s multibillion-dollar initiative to build and upgrade transmission to address evolving challenges for the region's grid.
A WECC report predicts annual demand in the Western Interconnection will grow from 942 TWh in 2025 to 1,134 TWh in 2034, although it says the region should have the resources necessary to meet that load.
Portland General Electric’s rate hikes largely stem from increased wholesale power market costs, the utility wrote after Sen. Ron Wyden voiced concern that Oregon customers are struggling to pay their electricity bills.
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