The Federal Energy Regulatory Commission on April 8 accepted a March 6 filing by Southern California Edison of a Large Generator Interconnection Agreement with AES North America Development LLC and the California Independent System Operator (CAISO) related to a planned repowering of the Huntington Beach power plant.
“SoCal Edison states, that pursuant to the CAISO Tariff Generator Interconnection Procedures, AES submitted an application to interconnect its proposed 973.246 MW (gross) combined-cycle thermal facility, named the Huntington Beach Generating Facility (Project), located in Huntington Beach, California, to the CAISO controlled grid,” FERC said. “The LGIA utilizes the CAISO’s currently-effective pro forma LGIA and specifies the terms and conditions pursuant to which: (1) SoCal Edison and CAISO will provide interconnection service, (2) SoCal Edison will design, procure, construct, own, operate, and maintain the interconnection facilities, (3) SoCal Edison will remove certain existing facilities located in the Huntington Beach substation that are owned by AES but maintained by SoCal Edison, and (4) AES will pay for such facilities and work. The LGIA is accepted for filing effective May 6, 2015, as requested.”
AES plans to retire the existing units 1, 2, 3 and 4 (approximately 870 MW (gross)) at the Huntington Beach site by demolishing these units in their entirety and replacing them with two combined-cycle gas turbine blocks (called Block 1 and Block 2). Each block would consist of three gas turbine generators, each unit rated at 113.825 MW, and one steam turbine generator, rated at 145.148 MW, for a net increase in generation capacity of 103.246 MW. The existing generating units 1-4 are interconnected to SCE’s 220-kV Ellis Substation via four 220 kV radial transmission lines from SCE’s Huntington Beach Substation, and the new project will interconnect at the same location. AES proposes a commercial operation date of Jan. 1, 2019, for Block 1, and June 1, 2020, for Block 2, Southern California Edison said in the March 6 filing at FERC.
In October 2014, AES Southland LLC was awarded 20-year contracts by Southern California Edison to provide 1,284 MW of combined cycle gas-fired generation and 100 MW of interconnected battery-based energy storage. This new capacity will be built at the existing AES sites in Huntington Beach and Alamitos Beach.
AES Southland and AES North America are both subsidiaries of AES Corp. (NYSE: AES).