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California ISO Approves Energy Storage, DER Enhancements

Oct. 6, 2020
Approval to make it easier to integrate and operate these resources while maintaining grid reliability.

The California Independent System Operator (ISO) Board of Governors recently approved energy storage and distributed energy resource (DER) enhancements, making it easier to integrate and operate these resources while maintaining grid reliability.

The board approval of Phase 4 of the Energy Storage and Distributed Energy Resources (ESDER 4) enhancements includes:

  • An optional end-of-hour, state-of-charge parameter to give storage resource owners real-time management of future resource use commitments;
  • Offering demand response resource owners the option of including a daily maximum run time constraint, and requiring a minimum of 1-MW curtailment to better manage demand response;
  • Streamlined participation by simplifying agreements for non-generator resources.

Battery and hybrid resources are fast growing components of the resource mix, with more than 1500 MW scheduled to connect to the grid by the end of 2021. They are an important component of a reliable and clean electricity grid. Excess solar generation in the middle of the day can be stored for use in the evening, when solar production declines and demand for energy increases.

Other items approved by the board include:

  • Refinements to the flexible ramping product to address uncertainty caused by load and variable energy resources that materializes between market runs;
  • Extension of reliability must-run contracts through 2021 for the Dynegy Oakland, LLC (DO), Starwood Energy Group (SEG), and CSU Channel Islands Site Authority (CSU CISA) generating units;

For more information on the ISO Board of Governors, including board presentation and future meeting schedules, visit here.

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