The California Independent System Operator’s Energy Imbalance Market (EIM) is a real-time power market, the primary of its sort within the western U.S. EIM’s superior market programs routinely discover low-cost power to serve real-time client demand throughout a large geographic space. But how does it work and what are the advantages?

The California Independent System Operator (CAISO) started financially binding operation of the western Energy Imbalance Market (EIM) on November 1, 2014. In the start, sources had been solely being optimized throughout the CAISO and PacifiCorp balancing authority areas. But since that point, NV Energy, Arizona Public Service, Puget Sound Energy, Portland General Electric, Idaho Power, and Powerex have turn into individuals within the EIM. The footprint now consists of parts of Arizona, California, Idaho, Nevada, Oregon, Utah, Washington, and Wyoming, even extending to the Canadian border.

Furthermore, the Balancing Authority of Northern California—a joint powers authority whose founding members are the Sacramento Municipal Utility District, Modesto Irrigation District, Roseville Electric, Redding Electric Utility, Trinity Public Utility District, and the City of Shasta Lake—will be a part of the EIM subsequent 12 months. The Los Angeles Department of Water and Power, Salt River Project, and Seattle City Light will enter the EIM in 2020, and Public Service Co. of New Mexico just lately introduced that it’ll be a part of by 2021, pending state fee approval (Figure 1).

1. An precise Bigfoot sighting. The western Energy Imbalance Market (EIM) has a big—and rising—footprint. Courtesy: California Independent System Operator (CAISO)

Expanding the Market to Outside Entities

The idea behind the EIM is nothing new; all ISOs and Regional Transmission Organizations (RTOs) run built-in day-ahead markets and real-time markets, which embrace 15-minute and five-minute markets. But what’s completely different about EIM is that CAISO has made its markets accessible to entities outdoors of its ISO territory. The end result has been enhanced grid reliability and price financial savings for individuals within the a whole lot of hundreds of thousands of . Besides its financial benefits, the EIM improves the mixing of renewable power, which results in a cleaner, greener grid.

“It was slightly distinctive from the standpoint that, what we name the EIM entities—the opposite utilities within the area which have determined to hitch—they’re not part of the ISO, and so their participation on this market is voluntary,” Don Fuller, director of strategic alliances with CAISO, informed POWER. “So, it’s principally the real-time market that we’ve operated, and increasing that and making it accessible to a broader area.”

The EIM facilitates renewable useful resource integration and will increase reliability by sharing info on electrical energy supply situations between balancing authorities throughout the EIM area. It permits individuals to purchase and promote energy near the time electrical energy is consumed, and provides system operators real-time visibility throughout neighboring grids. The market platform balances provide and demand fluctuations by routinely figuring out lower-cost sources from throughout a bigger area to fulfill real-time energy wants.

A Renewable Energy Enabler

“One of the issues we’ve got discovered with the power imbalance market is it’s serving to us and it’s serving to our neighbors higher accommodate massive penetrations of recent renewable sources, whether or not it’s photo voltaic or wind,” Fuller mentioned.

For California, that’s enormous; the state has plentiful renewable power sources and now a brand new mandate that can encourage additional development. On September 10, Gov. Jerry Brown signed laws requiring California to provide all its electrical energy from renewable sources by 2045. The new legislation additionally established a 60% renewable power goal by 2030 and accelerated the earlier 50% goal from 2030 to 2026. <a href="http://www.power.ca.gov/renewables/tracking_progress/paperwork/renewable.pdf"…

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