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CAISO EIM Updates!
by Gaby Flores
On March 25th, 2021, the Turlock Irrigation District and the Balancing Authority of Northern California (BANC) joined the Western Energy Inbalance Market (EIM) as active participants. What is the EIM? We’re so glad you asked!
In this blog, learn about:
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What the EIM is
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Who the EIM members are
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Who is new to the EIM, and who is expected to join
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What EIM data can be found in Yes Energy’s products!
What is the EIm?
EIM stands for Energy Imbalance Market. The Western EIM is operated by the California Independent System Operator (CAISO). The EIM is a real-time market, and it was the first real-time imbalance market in the west. The Western EIM launched in 2014. The market gives non-CAISO members access to the ISO’s real-time grid management system. The market currently has 14 active participants. In real-time, the market finds the lowest cost energy for real-time load in the west. The EIM also manages transmission line congestion and supports the use of renewable generation by ensuring that it doesn’t go to waste by offering generation to EIM participants at a lower cost instead of curtailing these units.
Who are the eim members?
There are 14 active EIM participants. The earliest members were CAISO, PacifiCorp, NV Energy, Arizona Public Service, Puget Sound, and Portland General Electric.
who is new to the eim & who is expected to join?
Seattle City Light and Salt River Project joined the EIM in 2020. On March 25th, 2021, the Turlock Irrigation District and the Balancing Authority of Northern California joined the EIM. Northwestern Energy, the Public Service Company of New Mexico, and the Los Angeles Department of Water & Power are set to join the EIM on April 1st, 2021. Seven additional utilities are potentially joining the EIM by the end of 2023.
what eim data can be found in yes Energy’s products?
Yes Energy collects EIM pricing information, congestion and constraint data, load, and flows. We also collect ramp information and greenhouse gas shadow prices. We make EIM data available in PowerSignals - for time-series research, congestion, and geographic studies. EIM data can also be found in our real-time tools like QuickSignals for monitoring and asset operations. Of course, it’s also in DataSignals for automation, data science, and big data analysis.
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