Siemens Energy Engaged to Bolster Grid Stability and Support Increased Renewable Power Generation in California

By AIT News Desk On Sep 22, 2021

Siemens Energy announced that it will provide four static synchronous compensator (STATCOM) installations for LS Power Grid California, LLC (LS Power) substation projects in California. A STATCOM is a quick-reacting system capable of providing or absorbing reactive power to regulate the voltage at the point of connection to a power grid. This voltage regulation will be key to ensuring the reliability of the power grid as renewable energy sources are brought online, enabling further decarbonization of California’s energy mix.

With the retirement of Pacific Gas and Electric Co.’s (PG&E) Diablo Canyon nuclear power plant in 2025, it is expected that there will be greater sensitivity to voltage instability, especially as PG&E integrates more renewable generation onto the grid. Two of the STATCOM systems are to be installed at LS Power’s Orchard substation connecting to the existing PG&E Gates 500 kilovolt (kV) substation in Fresno County to provide 848 megavolt-ampere (MVAr) of dynamic reactive power support. Under the light-load conditions, this support is anticipated to mitigate high voltages during extreme contingencies on the Bulk Power System.

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The other two STATCOMs will be installed at LS Power’s new Fern Road substation connecting the Round Mountain to Table Mountain 500 kV transmission lines. The purpose of these systems will be for voltage control and voltage support in case of system events and transmission outages.

“We are proud to partner with LS Power on this project,” said Matt Neal, vice president of Transmission Solutions for Siemens Energy. “LS Power has a forward-looking strategy to help ensure grid stability as more and more renewable power sources are part of the generation mix. When it comes to decarbonizing our energy systems, this will be one of the most important flexible AC transmission projects in the U.S., both in terms of the power and voltage rating, as well as the challenging location from a seismic perspective. We’re proud to support California’s efforts to incorporate more renewable energy sources into the power generation mix in a way that is not only efficient, but reliable in all weather conditions.”