California ISO, PacifiCorp discuss energy imbalance market

The California Independent System Operator (California ISO) and PacifiCorp will launch the Energy Imbalance Market on October 1 in planned stages to ensure seamless integration.

For the past several months, EIM has been tested in a simulation environment. During October the EIM will run parallel to PacifiCorp’s existing systems, giving both organizations a more accurate view of actual market and operating conditions.

PacifiCorp will submit daily schedules of demand and supply to the ISO, with EIM creating advisory dispatch instructions based on accurate data to optimize the EIM area. Binding dispatches and related financial settlements will begin on November 1.

The ISO and PacifiCorp, two of the largest western grid operators, announced a partnership in February 2013 to create the real-time energy market facilitated by the ISO and set a “go-live” target of Oct. 1, 2014.

Once fully operational, the EIM is expected to reduce energy costs and improve integration of renewable resources, among other benefits. An additional participant, NV Energy, has been given regulatory approval to participate in the EIM in 2015.

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