Power Analytics is pleased to announce our renewed partnership with San Diego Gas & Electric (SDG&E) as we continue work on the Borrego Springs Microgrid Project.

The Borrego Springs Microgrid was the first utility-owned and operated grid-connected microgrid in the U.S. and has been in operation since 2014. The Borrego Springs Microgrid is located in the Anza Borrego Desert and is home to approximately 3,000 residents. The microgrid is fed by a single radial transmission line and is susceptible to severe weather including high winds and flash floods.

The Borrego Springs Microgrid project initially included the installation and integration of two 1.8 megawatt (MW) diesel generators, one 500 kilowatt (kW)/1500 kilowatt-hour (kWh) lithium-ion substation energy storage unit and three 25 kW/50 kWh lithium-ion community energy storage units, a fault location, isolation and service restoration system, an automated demand response system with pricing-based event capabilities, advanced communication and protection schemes, and a microgrid controller to support, control, and monitor the microgrid. The project has since been expanded to include 26 MW of local solar generation and an additional 1 MW/3 MWh of battery storage. The microgrid successfully demonstrated its ability to island the entire community of Borrego Springs utilizing renewable energy resources as the major source of generation.

Using DesignBase, Power Analytics engineers reviewed the current power flow and overall effectiveness of the microgrid utilizing time-series data and a series of planned facility-islanding tests. The team of PAC and SDG&E engineers created a model to analyze the Advanced Power Flow and economic and community impact of the microgrid for various scenarios. In the next stage of the process, we will utilize the results of the power tests and impacts to develop recommendations for integration of additional energy resource assets, Automatic voltage/VAR control, and the optimization of the current and future operation of the microgrid.

Through this extensive project and analysis, Power Analytics will help the Borrego Springs Microgrid team to meet and exceed their original goals for the community and microgrid by optimizing the potential for increased grid reliability and stability, market participation, demand response, advanced metering infrastructure (AMI), and peak-demand shaving.

This analysis by Power Analytics is crucial to bringing the Borrego Springs community the resource adequacy, reliability, and resiliency that were the key objectives of SDG&E, the US Department of Energy, and the California Energy Commission.  

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