February 23, 2025

Western Energy Imbalance Market (WEIM)

Westside Governance Pathways Initiative
Western RTO Initiative Outlines Governance Options
The group working to establish a single Western RTO heard summaries of five potential options for a new governing body that could be independent of CAISO.
CAISO
CAISO DMM: High Exports to Southwest Led to July EEAs
CAISO's Department of Market Monitoring explained that self-scheduled exports to support stressful conditions led to the declaration of emergency alerts in July.
EIA
EIA: Renewable Curtailments Rising Steadily in CAISO

CAISO’s curtailment of solar and wind power is on the rise, and about three-quarters of curtailments so far this year have been from transmission congestion.

CAISO
CAISO May Scrap Policy Catalog; Start from Scratch
CAISO is looking at scrapping a catalog of about 60 proposed policies, which include many stakeholder suggestions, saying the document has become “unwieldy” and it might be better to start over from scratch.
© RTO Insider LLC
NW Stakeholders Divided on BPA Timeline for Day-ahead Decision
Electricity sector stakeholders expressed divisions over BPA's plan to pursue an aggressive timeline for deciding whether to join CAISO’s EDAM or SPP’s Markets+.
CAISO
Idaho Power Seeks FERC Help with $700K WEIM Fine
Idaho Power asked FERC to overturn a $700,000 fine for what it called a minor metering mistake that had no real impact on the Western Energy Imbalance Market.
CAISO
CAISO Files EDAM Proposal with FERC
CAISO asked FERC to approve the rules for its EDAM and revisions to its existing day-ahead market, intended to more accurately forecast load.
© RTO Insider LLC
In Contest for the West, Markets+ Gathers Momentum — and Skeptics
While some stakeholders are ‘charmed’ by SPP’s market initiative effort, others urge need for deeper tie to CAISO.
WEIM
WEIM Tops $4B in Benefits Months After Hitting $3B
The Western Energy Imbalance Market topped $4 billion in cumulative benefits in the second quarter of 2023, just six months after it topped the $3 billion mark.
WECC
Proposed New Western RTO Discussed at CREPC
Utility regulators from Oregon and California discussed their proposal for a new independent RTO covering the entire West for the first time publicly.

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