March 10, 2025

Western Energy Imbalance Market (WEIM)

Western EIM Questions Performance in Shortfalls
The Western EIM Governing Body discussed CAISO’s summer energy shortfalls, pondering how the EIM could better serve participants during system stress.
Hairston Appointed BPA Administrator
BPA acting administrator and CEO John Hairston will officially assume the top job at the federal power marketing agency, the DOE said.
CAISO to Focus on Resource Adequacy in 2021
CAISO’s top priority in 2021 will be making sure there is enough generating capacity for summer after last year’s shortfalls.
CAISO
Heat Waves Spur Record EIM Benefits
Benefits for participants in CAISO’s EIM surged past $119 million in the third quarter, a record amount driven by heat waves in Aug. and Sept.
Study: Western RTO Could Yield $1.2B in Yearly Savings
The creation of a Western RTO could save the region more than $1.2 billion annually in electric costs, according to a new study.
CAISO Floats EIM Base Schedule Rule Changes
CAISO launched a two-part initiative Wednesday that would alter how Western Energy Imbalance Market participants submit their base schedules.
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CAISO Retiring, Incoming CEOs Field Questions
CAISO's outgoing and incoming CEOs answered stakeholder questions in a roundtable discussion hosted by the EIM’s Regional Issues Forum.
Solid Support for EIM Joint Authority Plan
EIM stakeholders broadly support a proposal that would expand the Governing Body’s approval authority and grant it a “more collaborative” relationship with CAISO’s board.
Heat Waves, Blackouts Slow Western EIM Expansion
Heat waves and capacity shortfalls have slowed an effort by the Western EIM to expand from a real-time interstate trading forum to a day-ahead market.
PGE Traders Burned by California Heat Wave
PGE (NYSE: POR) said it suffered $127M in losses from wholesale electricity trades due to recent volatility in California's energy market.

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