Keys Energy Center gas project okayed by Maryland PSC

The Maryland Public Service Commission, after no party objected by an Oct. 31 deadline, on that day issued a certificate of public convenience and necessity for a 755-MW power project of Keys Energy Center LLC.

The commission Public Utility Law Judge handling the case had issued a proposed order on Oct. 17, which became a final PSC order on Oct. 31 after no objections to it were filed. This case had been pending since July 2012.

Keys Energy Center proposes to construct a new nominal 755-MW, two on one (2×1) combined-cycle, natural gas-fired plant in Prince George’s County, Maryland. The power plant will interconnect with Potomac Electric Power and PJM Interconnection through a transmission line adjacent to the project.

The project will be fueled by natural gas. The gas will be transported by a nominal-24 inch pipeline extension originating in Charles County, Md., at an existing 36-inch interstate gas pipeline owned by Dominion Transmission.

Keys Energy Center on Sept. 24 had argued for a fast approval by the PSC so it can get into construction and be operating by June 2017.

Filings with the commission in recent months show that this plant would consist of:

  • Two Siemens Model SGT6-5000Fee (F-class) combustion turbines (CTs) each with a nominal capacity of 235 MW, fueled exclusively on pipeline quality natural gas, equipped with low-NOx combustors;
  • Two heat recovery steam generators (HRSGs) each with duct burners rated at 443 million British Thermal Units per hour (MMBtu/hr), higher heating value (HHV) basis, fueled exclusively on pipeline quality natural gas and including a selective catalytic reduction system (SCR) and an oxidation catalyst;
  • One auxiliary boiler, rated not more than 93 MMBtu/hr (HHV) and equipped with ultra-low NOx burners (ULNB) and flue gas recirculation (FGR); and
  • Two diesel-fired auxiliary generators (emergency generators), each rated at nominal 1,500-kW.

PJM on May 19 filed at the Federal Energy Regulatory Commission a revised interconnection service agreement among PJM, Keys Energy Center and Potomac Electric Power for this project. Under the ISA, on or before June 1, 2017, Keys Energy Center must demonstrate commercial operation of all generating units.

In the meantime, another gas-fired power project to be located near the planned Keys Energy Center is still awaiting PSC approval. Mattawoman Energy LLC, which wants to build an 859-MW, gas-fired combined-cycle facility in Prince George’s County, on Oct. 24 suggested a new procedural schedule to the PSC for the review of this project. The proposed new case schedule includes a July 22, 2015, final order target date.

Company representatives on June 30 had provided updates to the Maryland PSC on the status of the project, which has been under consideration for a PSC approval since July of last year. Steven Tessem, the Vice President for Business Development for Panda Power Funds, the parent company of Mattawoman Energy, said the linear facilities being worked on are: the interconnect to the electric transmission system; the water connection with the Piscataway Wastewater Treatment Plant; and the gas lateral connection from the project to Dominion Cove Point LNG LP’s natural gas pipeline. The Mattawoman project is an 859-MW, two-on-one, combined-cycle facility configured with two Siemens H-class combustion turbines, two heat recovery steam generators with supplemental duct firing, and one steam turbine generator in a multishaft arrangement.

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.