Western Energy Imbalance Market (WEIM)

Southern California Edison
CAISO Board Approves Summer Readiness Measures
The CAISO Board of Governors approved measures to boost summer reliability, including extending a requirement that batteries be charged during extreme events.
Lochsa Engineering
Nev. Regulators OK Controversial Gas-fired Peaker
State regulators approved NV Energy’s controversial plan to build a 400-MW gas-fired peaker in Southern Nevada that the utility says is needed for reliability.
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EBA Addresses ‘Zeitgeist’ of Western Regionalization
The Energy Bar Association Western Chapter heard panelists and CAISO's CEO discuss rapidly evolving efforts to organize markets and an RA program in the West.
Shutterstock
CAISO Sends Regionalization Report to Lawmakers
CAISO sent the California Legislature a summary of recent studies of Western regionalization, information intended to aid discussion of the ISO becoming an RTO.
CAISO
CAISO Revises Policy Roadmap to Highlight Priorities
CAISO revamped its policy initiatives roadmap to reflect its to top strategic goals including ensuring resource adequacy and expanding its Western market role.
Steven Baltakatei Sandoval, CC BY-SA 4.0, via Wikimedia Commons
FERC OKs WEIM Changes for Washington Cap-and-trade Costs
The Western EIM tariff changes allow generators to include the costs of GHG compliance associated with Washington’s cap-and-trade program in their energy bids.
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Washington Poised to Become Net Electricity Importer by 2050
The push for decarbonization will transform Washington from a key exporter of electricity to a net importer by mid-century, a state agency has found.
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CAISO Approves Day-ahead Market for Western EIM
CAISO's Board of Governors and the Western Energy Imbalance Market Governing Body approved an extended day-ahead market for the WEIM, calling it a milestone.
Washington State Democrats
Wash. Bill Seeks to Accelerate Renewable Buildout
A bill to boost construction of renewable power in Washington picked up support — ranging from strong to conditional — at a key Senate hearing.
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NV Energy Blames ‘Heavy Wet Snow’ for New Year’s Outages
NV Energy told Nevada regulators that “extreme weather” and wet snow caused outages that cut power to nearly 124,000 customers at the start of the year.

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