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Washington, Arizona utilities begin testing CAISO EIM integration

California is integrating two out-of-state utilities into its EIM, but will remain in test phase for now.

“The EIM has been successful in saving tens of millions of dollars by leveraging the generation and transmission capacity across the West, with a larger geographic region to optimize,” CAISO President and CEO Steve Berberich said in a statement. “The addition of APS and PSE will create more opportunities to produce additional benefits, including improved integration of renewable energy.”

APS is based in Phoenix, while PSE operates in Washington state. The two will join PacifiCorp and NV Energy in the West’s real-time energy market, serving customers in eight states. According to the ISO, Portland General Electric is scheduled to enter the market in October 2017, and Idaho Power will begin participation in the spring of 2018.

California launched the EIM in late 2014, and since then says it has produced more than $88 million in benefits to its customers…….

Read full article at Utility Dive