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September 30, 2024

Western Energy Imbalance Market (WEIM)

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Overheard at NARUC Summer Policy Summit 2021
More than 600 people attended the NARUC Summer Policy Summit in person and hundreds more watched via livestream.
RTO Insider LLC
FERC Tosses NV Energy Complaint Against CAISO Summer Plan
FERC dismissed an NV Energy complaint related to CAISO’s plan to restrict certain wheel-through transactions when tight power supply threatens reliability.
CAISO
Western EIM Governing Body Elects New Member, Chair
The EIM Governing Body elected Jennifer Gardner to replace retiring member Carl Linvill and appointed Anita Decker as its new chair.
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FERC OKs CAISO Wheel-through Restrictions
FERC approved CAISO's controversial rule changes on wheel-throughs, intended to ensure the ISO has adequate capacity this summer.
Colorado Energy Office
Xcel Delays Joining EIM to Examine Options
Xcel's Public Service Company of Colorado decided to delay its entry into CAISO's Western Energy Imbalance Market in order to re-examine its decision.
CAISO Board Approves EIM Governance Changes
CAISO and the EIM Governing Body approved changes to the EIM’s governance structure involving the selection of body members and stakeholder engagement.
Joint CAISO-EIM Authority Debated in West
Supporters and skeptics of a plan to give the EIM’s Governing Body more joint authority with CAISO over changes to the market debated the matter.
Cold Snap Yields Record Q1 Benefits for Western EIM
CAISO's EIM provided its members $101.01 million in economic benefits during the first three months of 2021, an increase of 75% over a year ago.
Wheeling Debate Tests West, CAISO CEO Says
CAISO stakeholders are still wary of the new proposed wheel-through provisions the ISO has submitted to FERC for clarity on the complex issue.
EIM Governing Body Rejects Part of CAISO Summer Plan
The Western EIM Governing Body rejected CAISO’s proposal to head off summer capacity shortfalls by limiting wheel-throughs during times of scarcity.

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