Mattawoman Energy LLC, a project affiliate of Panda Power Funds, applied July 19 at the Maryland Public Service Commission for approval of an 859 MW, gas-fired power project to be located about 12 miles southeast of Washington, D.C., in Prince George’s County, Md.
The company is seeking a certificate of public convenience and necessity (CPCN) for this project. It would be for a 2-on-1, gas-fired combined-cycle facility featuring two H-class combustion turbines and two duct-fired heat recovery steam generators.
Power from this facility, located about two miles from the existing Panda Brandywine Cogeneration Facility, would move to an existing 230-kV transmission line running along Brandywine Road of Potomac Electric Power. For gas supply, the project would be tapped into the existing Dominion Cove Point gas pipeline.
The Panda website said the Panda Brandywine cogeneration plant is an oil- and gas-fired, 230 MW facility that began operations in 1995.
The Mattawoman project is needed to serve regional power needs, including the hole created by coal-fired capacity retirements, the company told the PSC. The company would like a commission approval by March 1, 2014, which would give it enough time to get the plant built and for it to provide power into PJM Interconnection’s 2017-2018 Base Residual Auction.
The turbines will use low-NOx combustion technology and will be equipped with selective catalytic reduction (SCR) systems to control NOx emissions. High-efficiency combustion design, with add-on oxidation catalyst, will be employed to control carbon monoxide and volatile organic compounds emissions. The exclusive use of pipeline-quality natural gas will minimize particulate matter/particulate matter less than or equal to 10 micrometers, sulfur dioxide, and sulfuric acid air emissions.
The two turbines will be Siemens H-class machines, each capable of producing a nominal 273 MW of electricity. The maximum heat input of the duct burners will be 300 million British thermal units per hour higher heating value for each HRSG. The turbines will be equipped with evaporative inlet air cooling, which is designed to lower the CT intake air temperature during periods of higher ambient air temperatures. The turbines will be capable of operating between 50 percent and 100 percent load and will be fired exclusively with natural gas. The project is expected to operate at an overall 75 percent to 90 percent capacity.