Western Area Power Administration Desert Southwest Region Joins Western Energy Imbalance Market

April 10, 2023

by Paul Ciampoli
APPA News Director
April 10, 2023

The Western Area Power Administration Desert Southwest region, Texas investor-owned utility El Paso Electric and AVANGRID on April 5 formally began participating in the California Independent System Operator’s Western Energy Imbalance Market.

WEIM now represents nearly 80% of the demand for electricity in the Western interconnection.

Click here for additional details on other WEIM members, which include a number of public power entities.

As the WEIM has continued to grow, CAISO has been moving toward the launch of the Extended Day-Ahead Market, an initiative that was jointly approved in February by the ISO Board of Governors and the WEIM Governing Body.

When it goes live, the EDAM will offer WEIM partners the opportunity to participate in the day-ahead market, where the majority of energy transactions occur and even greater benefits are expected.