A Prince George’s County, Md., gas-fired generation asset, Brandywine Power, moved from Onward Energy to AlphaGen, adding approximately 250 MW of combined-cycle capacity to AlphaGen’s power infrastructure portfolio with ArcLight backing the buyer.

The facility operates within PJM Interconnection’s PEPCO Zone, a power market that includes the Washington, D.C., metro area.

Brandywine Power supplies capacity, energy and ancillary services to utilities, municipalities, electric cooperatives and large-load customers across the mid-Atlantic.

The plant’s combined-cycle natural gas configuration places it in a dispatchable generation segment used by regional grid operators for reliability and market supply.

AlphaGen is an ArcLight-backed power infrastructure company with generation assets serving U.S. power markets.

The Brandywine purchase adds another PJM-located thermal asset to the company’s portfolio and follows AlphaGen activity tied to generation uprates and long-term power supply in the region.

Onward Energy is an independent power platform with renewable and thermal generation assets.

The transaction materials did not include valuation, financing providers or outside legal and financial advisers.