Lawrence Berkeley Team to Develop $13M Microgrid at Ft. Hunter Liggett

The Lawrence Berkeley National Lab (LBNL) will lead a team installing a $13 million renewable microgrid at Fort Hunter Liggett, Calif., as part of an effort to demonstrate how a cyber-secure microgrid that relies on renewable energy generation will operate and to produce an interoperable control system ready for commercial use.

This project will demonstrate how to integrate diverse distributed energy resources while providing resiliency against natural disasters at the central California Army Reserve installation. The microgrid will be designed to operate independently of the commercial grid for long periods of time. In the event of grid disturbances or outages, Fort Hunter Liggett will be able to operate for a minimum of 120 consecutive hours, delivering a minimum of a 1-megawatt load and 2 megawatts for 4 hours peak, according to a press release from the LBNL grid integration group.

Fort Hunter Liggett is a pilot net-zero installation intended to operate using 8 megawatts of photovoltaic power generation and an 8-megawatt-hour battery system to serve the most critical loads. The batteries will be augmented by complex demand-response algorithms and building management systems as well as a bio-gas combined heat and power generation system, according to the release.

In the grid-connected mode, Fort Hunter Liggett will operate interactively, as a market participant for capacity and ancillary services.

The installation is located at the end of a Pacific Gas and Electric line, which can create difficulties if too much energy generated onsite is fed into the system. This problem has been addressed by line upgrades and a second feeder, currently under construction.

Dan Cohen
Dan Cohen

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