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.
Critics of a proposal to lower the CAISO energy market bid floor questioned its efficacy in solving the ISO’s increasing intervals of oversupply.
CAISO is refining a proposal for cost allocation of new transmission facilities in an expanded balancing authority that would include areas of the West outside California.
Pacific Gas and Electric (NYSE:PCG) filed with California regulators last week to shut down Diablo Canyon, the state’s last remaining nuclear power plant.
CAISO is developing a plan to shield small transmission owners from upgrade costs for interconnecting generation to serve load outside the TOs’ service areas.
CAISO's effort to expand into a Western RTO will be postponed this year after California Gov. Jerry Brown postponed a formal proposal.
CAISO last week began work on a plan to extend external resource participation in the western Energy Imbalance Market (EIM).
A federal judge in Southern California declined to dismiss a lawsuit alleging that CAISO unjustly deprived the Imperial Irrigation District of its full export rights.
Arizona Public Service and Puget Sound Energy have moved a step closer to linking up with CAISO’s Energy Imbalance Market (EIM).
CAISO provided stakeholders an update on its efforts to address Air Resources Board (ARB) concerns that the EIM is not properly accounting for the impact of emissions.
Edison International, and its SoCalEd subsidiary, are maneuvering to capitalize on California’s effort to meet its greenhouse gas emissions goals.
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