FlexGen, an energy storage system integrator that counts GE and Caterpillar among its backers, said this week that a lithium-ion battery storage system it was supplied was used by an Indiana utility to black start a 77MW natural gas plant.
Thermal power plants that go offline require black starting and the application is considered an essential service for the grid. While the theory of using batteries to perform this application, akin to “jump starting” a vehicle, was sound, grid-scale battery energy storage systems did not start actively doing so until around 2016, when Energy-Storage.news reported on projects in Germany and later in California that successfully proved the case in real-world settings.
Black start is still done using diesel generators in many places, including at FlexGen’s unnamed “leading Indiana utility” customer. FlexGen deployed a 12MW / 5.4MWh short duration lithium-ion battery storage system which has successfully black started one of two 77MW gas turbines.
As well as being zero emissions resources, FlexGen claims that batteries can perform the application at half the cost of diesel generators, coming online when there is a blackout to repower turbines. FlexGen said its proprietary software, called HybridOS can enable the functionality at any commercially available turbine. While energy storage systems have been used to black start power plants already, FlexGen claims its Indiana system black started a 112MVA generation set-up transformer (GSU), making it the largest black start of its kind of a transformer in the US to date.
“FlexGen provides integral capabilities like black start for utility clients’ existing power plant sites through cost-competitive battery storage assets. We look forward to helping Indiana further integrate carbon-free technologies that increase the reliability of the electric system,” FlexGen chief operating officer Alan Grosse said.
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