Western Energy Imbalance Market (WEIM)

Moonwater Capital
PUCN Sets Framework for NV Energy’s EDAM Participation
As NV Energy moves forward with plans to join CAISO’s Extended Day-Ahead Market, Nevada regulators have laid out a framework for how the company can seek approval for EDAM participation.
West-Wide Governance Pathways Initiative
Pathways Backers Advance WEIM/EDAM Governance Proposal
Backers of the West-Wide Governance Pathways Initiative will move quickly on a proposal to alter the governance of CAISO’s Western EIM and EDAM after voting to approve the plan.
Terra-Gen
CAISO, WEIM Boards Approve Proposal to Raise Offer Cap
CAISO’s Board of Governors and WEIM Governing Body unanimously voted to approve an expedited proposal to increase the ISO’s soft offer cap from $1,000/MWh to $2,000.
WW Clyde
Is NV Energy Leaning to CAISO’s EDAM?
An NV Energy executive provided the strongest public indication yet as to why the utility is poised to choose the ISO's Extended Day-Ahead Market over SPP’s Markets+.
CAISO
WEIM Q1 Benefits Report Adds to NW Cold Snap Debate
CAISO’s first-quarter benefits report offers another footnote to the debate over the market’s role in the response to the January deep freeze that brought parts of the Northwest to the brink of rolling blackouts.
CAISO
WEIM Expert Calls for Fast-start Pricing to Address ‘Anomalies’

Fast-start pricing could fix certain “price anomalies” in CAISO markets more effectively than existing mechanisms for compensating ramping resources, the WEIM Governing Body’s market expert told the group.

CAISO
DMM: CAISO Transfer Limitations During Q3 Heat Waves Led to Price Disparities
CAISO's Department of Market Monitoring found that limits on WEIM imports last year led to increased transmission congestion in the ISO's markets.
© RTO Insider LLC
NW Freeze Response Shows WEIM Value, CAISO Report Says
The 80-page report represents the latest volley in an ongoing skirmish among Western electricity sector stakeholders over what exactly occurred on the regional grid during the Jan. 12-16 deep freeze.
CAISO
CAISO CEO Emphasizes Power of Partnership in West
In an interview, CAISO CEO Elliot Mainzer touted the importance of interregional coordination — and a single Western market — to meet state policy and reliability goals.
CAISO
WEIM Ends 2023 Exceeding $5B in Benefits
CAISO’s WEIM last year hit $5.05 billion in benefits for its members since its inception in 2014, continuing the positive trend of growth tied to an expanding Western footprint.

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