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The California Independent System Operator Corp. (ISO) has released a blueprint for integrating electric vehicles (EVs) into the grid. The ISO says the roadmap builds upon efforts already underway in both the private and public sectors to enable EV aggregations.

According to the ISO, the report - "The Vehicle-Grid Integration Roadmap: Enabling Vehicle-based Grid Services" - outlines three interdependent tracks to assess how consumer use of electric vehicles could benefit electric reliability and determine policies and technologies necessary to elicit that value through appropriate market signals for a more reliable, sustainable electric grid.

In 2012, Gov. Jerry Brown, D-Calif., issued an executive order setting a target of 1.5 million zero-emission vehicles (ZEVs) on California roads by 2025, the ISO notes. The system operator adds that in order to help realize this goal, the governor's Interagency Working Group on Zero-Emission Vehicles published a ZEV Action Plan.

The ISO says that the plan assigned it to lead the coordinated roadmap effort in collaboration with the California Energy Commission, California Public Utilities Commission, the California Air Resources Board, the Governor's office and industry stakeholders. The roadmap identifies actions that will advance the state's ZEV goals.

Ideally, coordinating EV charging with grid conditions and providing a mechanism for aggregation of EVs to respond to the ISO's signals will maximize the benefits to be gained from EV use, the ISO reports. The roadmap also explores the potential for vehicle-grid integration services to be included in clean technology development, such as demand response, energy storage and energy efficiency.

The system operator says it is important that EV grid products are harmonized with system operations, including the creation of the right incentive price signals to ensure EVs are charged during non-peak periods.

"As the electricity system in the state evolves, now is the time to advance coordination with state agencies and stakeholders to realize the untapped benefits from widespread use of electric vehicles," comments ISO Director of Regulatory Affairs Heather Sanders, who managed the roadmap's development.

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