California utility uses battery to 'black start' conventional turbine
Southern California utility Imperial Irrigation District (IID) has successfully demonstrated the use of a battery energy storage system (BESS) to perform a 'black start', restoring power to an electric power generator without calling on external transmission lines, in a move that could improve grid resilience. Earlier this month, IID's 33 MW/20 MWh lithium-ion BESS kick-started El Centro Generating Station's 44 MW combined cycle natural gas turbine, in what IID manager for energy department, Vicken Kasarjian, called a “major accomplishment in the energy industry". In January, the same process was performed for the first time ever by German-American technology firm Younicos.
Black starting is the restoration of power functions to an electric power generator, network or grid without having to call on external transmission lines. The 33MW / 20MWh lithium-ion battery energy storage system (BESS), which in its everyday use provides grid stability and helps smooth the output from local renewable power sources, was used on 10 May to kick-start an IID 44MW combined cycle natural gas turbine, located at El Centro Generating Station in Imperial Valley, California.

The ability of batteries to provide this much-needed grid function has long been discussed. Improving the efficiency of existing thermal generators could be a quick way to deploy batteries and boost decarbonisation and make power networks more flexible.

Networks would otherwise be dependent on fossil fuel generators running continuously or would have to wait for them to ramp up. Imperial Irrigation District manager for its energy department, Vicken Kasarjian, hailed the black start as a “major accomplishment in the energy industry”.

“The battery energy storage system did not only provide startup power, but converted it, allowing the generator to achieve synchronisation. To our knowledge, this is the first time in history that a battery energy storage system black-started a generator in an operational situation,” Kasarjian said.

Claim of world first could be jumping the gun