USA, Arizona:

Arizona Public Service Will Join California Energy Imbalance Market (Utility Dive)

Arizona Public Service (APS), Arizona’s largest and longest-serving electricity utility, has reached a deal to join the growing Energy Imbalance Market in the west, a move which could save customers $7 million to $18 million a year, according to an assessment by Energy and Environmental Economics. Current EIM participants will benefit by $3 million to $6.5 million annually, in addition the benefits they already realize, the analysis also found.

Based in Phoenix, APS serves more than 1 million customers in Arizona and asked the consulting firm to run analysis on what joining the market would mean. The firm has done similar studies for NV Energy, which will join the market later this year, and Puget Sound, which is also considering the move.

The new market allows for rebalancing supply and demand in 15-minute blocks with dispatching every five minutes before  energy is needed.

APS contracts for 10 megawatts of geothermal energy from the CalEnergy CE Energy Turbo plant in Calipatria, California.

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