Southern California Edison on Dec. 9 filed with FERC a Generator Interconnection Agreement between itself as both the interconnecting transmission owner and the developer of a battery storage project at the existing Grapeland peaking power plant.
The utility worked up this project under an expedited California Public Utilities Commission-approved process to develop storage projects to address local grid reliability concerns in the Los Angeles Basin ahead of the 2016-2017 winter period.
Southern California Edison already has a Large Generator Interconnection Agreement, dated June 2007, for a 44.55-MW gas generator at the Grapeland facility. Then it submitted an interconnection request dated July 15, 2016, to add 10 MW of battery storage and 5.35 MW of incremental generation output to the existing 44.55-MW facility.
This new GIA will both replace the 2007 LGIA and cover the new capacity.
The revamped facility is descibed under the new GIA as consisting of: "All equipment and facilities comprising the Interconnection Customer’s 59.9 gross MW Grapeland EGT Install generating facility (10.0 MW battery storage and 5.35 MW of incremental generation to the existing 44.55 MW) which will be limited to not exceed 49.9 MW net at the high side of the main transformer bank, located in Rancho Cucamonga, California, as disclosed by the Interconnection Customer in its Interconnection Request, as may have been amended during the Interconnection Study process, which consists of (i) one (1) 71.2 MVA (name plate), General Electric LM6000 PCSprint gas fired turbine-generator package; eight (8) GE BESS Brilliance inverters each rated at 1.25 MW, one (1) 13.8/66kV generator step-up transformer with an impedance of Z= 8%, (ii) the associated infrastructure, (iii) meters and metering equipment, and (iv) appurtenant equipment. The Grapeland EGT Install Project shall consist of the Generating Facility and the Interconnection Customer’s Interconnection Facilities. The maximum rated charging capacity of the Generating Facility is 10 MW."
The Point of Interconnection for the facility is where a 66-kV line from Grapeland Substation taps into the Ameron-Etiwanda-Grapeland-Pipe 66-kV line.
The project’s commercial operation target date is Dec. 23.