Approval sought for innovative gas turbine/battery project in California

Stanton Energy Reliability Center LLC applied Oct. 26 at the California Energy Commission for approval to construct, own, and operate a hybrid electrical generating and storage facility in Orange County, California.

The Stanton Energy Reliability Center (SERC) will consist of two General Electric (GE) LM6000-based EGTs. EGT refers to the LM6000 PC Hybrid EGT jointly developed by General Electric International and Wellhead Power Solutions. The EGT combines a combustion gas turbine with an integrated battery storage component operated by a proprietary software system.

Each EGT will consist of a GE LM6000 PC natural gas-fired, simple-cycle combustion turbine, a clutch to provide operational flexibility as a synchronous condenser, and an integrated 10-MW GE Battery Energy Storage System. In total, SERC will provide 98 MW (nominal) of EGT capacity.

The EGT provides a broad array of unique reliability benefits that neither gas turbines nor batteries can provide on their own, the application noted. SERC has been designed to deliver superior reliability services with a minimal carbon footprint and a low emissions profile. The project will be one of the first commercial applications of the EGT technology. Using this technology, SERC is able to combine dispatchable, operationally flexible, and efficient energy generation with state-of-the-art energy storage technology to meet the need for new local capacity and reliability services specifically in the West Los Angeles (LA) Basin local reliability area of Southern California Edison’s (SCE’s) service territory.

The SERC project will be located in the City of Stanton, Orange County, at 10711 Dale Avenue. Land uses surrounding the site include the City of Stanton’s industrial area to the north and south, public/quasi-public utility areas to the east consisting of the SCE Barre Peaker power plant and Barre Substation, and high- and medium-density residential uses to the southeast and northwest.

The main project elements include:

  • Two GE Energy LM6000 PC combustion turbine generators (CTGs) (or equivalent) equipped with selective catalytic reduction air emissions control equipment and associated support equipment for nitrogen oxides (NOx) and carbon monoxide (CO) control;
  • Two sets of lithium-ion batteries housed in purpose-built battery enclosures, each with a nominal capacity of 10 MW (total of 20 MW) and 5 megawatt hours of storage (total 10 megawatt hours);
  • Interconnection to SCE’s Barre Substation via a 0.35-mile-long underground generator tie-line that runs from the SERC site east to the substation;
  • Natural gas pipeline connection via either a new 12- or 16-inch-diameter pipe that will extend either 2.75 miles north along Dale Avenue to Southern California Gas Co.’s (SoCalGas) Line 1014 in La Palma Avenue or 1.78 miles south along Dale Avenue to SoCalGas’s Line 1244 in Lampson Avenue; and
  • Process and potable water supply from Golden State Water Co. via connections on the east to Dale Avenue and on the west to Pacific Street.

The battery storage system is to be constructed after construction of the gas turbine part of the EGT is complete.

SERC will provide various environmental and economic benefits, including:

  • California Public Utilities Commission (CPUC)-approved Resource Adequacy Purchase Agreements (RAPAs). SERC has two RAPAs with SCE that were approved by CPUC in recognition of the strategic site location to provide local reliability support to the SCE West LA Basin subarea.
  • Uses the innovative EGT technology jointly developed by Wellhead Power Solutions and GE. The EGT technology uniquely provides the following: greenhouse gas-free operating reserve; flexible capacity without start time; peaking energy for local contingencies; voltage support and primary frequency response without fuel burn; superior transient response attributable to co-location of gas turbines and battery; and gas turbine supervisory control system management of battery state-of-charge.
  • Local Reliability Support in the SCE West LA Basin Subarea, With the shutdown of the San Onofre Nuclear Generating Station and as the retirement of aging coastal plants that use once-through cooling, SERC will provide much-needed generation for local reliability in SCE’s West LA Basin Subarea. This subarea has been specifically identified by the California Independent System Operator as needing local reliability generation and ancillary grid services, and this project was selected by SCE out of over 100 proposals received as part of the SCE’s 2013 Local Capacity Requirements Request for Offers sanctioned by CPUC to address this specific need.

The project company is a joint venture of W Power LLC and Wellhead Energy LLC. W Power is the majority partner.

W Power is a 100% female-owned Diverse Business Enterprise (DBE) possessing state of California DBE certification as a Women Business Enterprise under the CPUC certification process. W Power also possesses federal DBE certification as a Women-Owned Small Business via the United States Small Business Administration certification process.

Wellhead Energy is an affiliate of Wellhead Electric Co. Inc., which is a developer, owner, and operator of small and medium-sized power plants. Privately held since its founding in 1982, Wellhead is the only remaining California-based independent power producer. Wellhead has developed the EGT and has a patent pending on the technology.

SERC is filing this Application for Certification (AFC) under the California Energy Commission’s (CEC’s) 12-month licensing process. Construction of the SERC project is expected to begin no later than November 2018. Pre-operational testing of the power plant is expected to begin in September 2019, and full-scale commercial operation is expected to begin by December 2019.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.