Moundsville Power LLC proposes to install PJM Project #Y3-068, a 525-MW natural gas-fired generating facility (2×1 Combined Cycle) that would interconnect to the American Electric Power (NYSE: AEP) transmission system.
A system impact study on the project from PJM Interconnection, dated June 2014, said the point of interconnection requested is a direct connection to the George Washington 138-kV station via two 138-kV breakers. The location of the natural gas generating facility is southwest of Moundsville, W.Va., along the Ohio River. The requested in-service date is June 1, 2018. The project entered the PJM project queue in March 2013.
The PJM report said:”Y3-068 consists of two gas turbine generators and a steam turbine generator. The Y3-068 gas turbine generators are each rated at 170.3 MW (maximum winter rating) and the steam turbine generator is rated at 198.3 MW. Y3-068 machines are connected to the George Washington 138 kV substation (POI) via two 165 MVA 145 / 18 kV and one 220 MVA 142 / 18 kV generator step up (GSU) transformers and a 0.5 mile transmission line.”
Moundsville Power in December 2013 submitted a revised air permit application for this project at the West Virginia Department of Environmental Protection. The revised application reflects comments provided by WVDEP and changes in project equipment and design that have evolved since the October 2013 original application.
One change is a switch from the General Electric (GE) combustion turbine model that was originally to be the Frame 7FA.05, to the 7FA.04, and the addition of duct firing to the heat recovery steam generators (HRSGs). These changes result in an overall decrease in the nominal generating capacity of the plant from approximately 615 MW to approximately 525 MW. 525.6 MW is the expected plant output at a 92˚F ambient temperature design condition, 45% relative humidity, at base load, firing a natural gas/ethane fuel mix, with duct firing, and with the combustion turbine evaporative cooling systems off.
A 100 MMBtu/hr auxiliary boiler will be used to produce steam for plant support. The auxiliary boiler will burn either pipeline-quality natural gas or a blend of pipeline-quality natural gas and up to 25% ethane. A wet, mechanical draft cooling tower will be used to cool the plant’s steam-driven electric generator.
Moundsville Power announced this project on April 22.