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December 28, 2025

California Independent System Operator (CAISO)

CRR Initiative Elicits Mixed Reviews from CAISO Participants
The CAISO decision to possibly prioritize reforms to its congestion revenue rights auctions in 2017 has provoked mixed reactions from stakeholders.
WAPA Approves Route for TransWest Express Line
WAPA has selected a route for the TransWest Express transmission project, an HVDC line proposed by Anschutz Corp.
CAISO Study Backs Use of Renewables for Grid Reliability
Solar photovoltaic resources can provide ancillary services in a way comparable to conventional generating resources, according to a study released by CAISO.
FERC Clarifies Western Energy Crisis ‘Pricing Umbrella’ Theory
FERC said evidence of price reporting deficiencies by power sellers during the Western Energy Crisis cannot constitute the sole basis for a finding of market manipulation.
WAPA, SMUD Extend Scoping Period for Colusa-Sutter Project
WAPA and SMUD said the Colusa-Sutter project will provide additional bidirectional transmission capacity to improve SMUD’s ability to participate in CAISO’s Energy Imbalance Market (EIM).
California Tx Policy Must Foster Resource Diversity, Report Shows
California will require improved transmission access to renewable resources to meet its environmental targets, according to a new report from the Energy Commission.
FERC OKs New CAISO Load-Serving Entity Definition
FERC approved a new definition of a “load-serving entity” in CAISO that includes those that purchase wholesale electricity to serve their own needs.
CAISO Expansion in Question as EIM Grows
CAISO rang in 2016 with a strong push to expand its EIM into PacifiCorp’s sprawling service territory, but the project hit a stumbling block by mid-year.
CAISO Seeks Primary Frequency Response Market
CAISO has kicked off an initiative to explore how it can procure resources equipped to automatically respond to disturbances in grid frequency.
CAISO Board Welcomes GridLiance Membership
The CAISO Board of Governors approved the membership of GridLiance after their purchase of the Valley Electric Association’s 230-kV transmission network.

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