PJM studying latest addition to Sunbury coal plant repowering project

PJM Interconnection Queue #Z1-090 is a Hummel Station LLC request to interconnect a 381 MW Energy (381 MW Capacity) Resource consisting of one heat recovery steam unit (new Unit 8) to the PPL Electric Utilities system in Pennsylvania.

PJM added: “Sunbury generation units 1, 2, 3, and 4 were retired at Sunbury on July 2014. The new unit 5 will be installed under queue X4-019 and new units 6 & 7 will be installed under queue X2-025. X2-025 and X4-019 projects are not impacted by Z1-090 project. The additional generation from queue Z1-090 will provide Sunbury 500kV switchyard with a total of 1024 MW Energy (1024 MW Capacity).

“Queue Z1-090 is located in Monroe Township, Snyder County at the existing Sunbury power plant property. Queue Z1-090 generation interconnection is scheduled for commercial operation on June 1, 2017. This study does not imply a PPL Electric Utilities (PPL EU) commitment to this in-service date.

“The scope of this study is to determine the direct connection costs and PPL EU network upgrades required to accommodate the proposed 500 kV interconnection point. The interconnection described in this report was evaluated based on the assumption that X2-025 and X4-019 will be placed in service prior to Z1-090, and that Z1-090 will be connected to PPL EU’s transmission system through the same facilities previously constructed for X2-025 and X4-019. If X2-025 and X4-019 are delayed or withdrawn from the queue, this Facilities Study will be revised.”

In other recent developments for this project:

  • Hummel Station LLC applied at the Pennsylvania Department of Environmental Protection for modification of an air permit for the construction of three natural gas-fired combined-cycle combustion turbines coupled with heat recovery steam generators (HRSGs) equipped with natural gas fired duct burners capable of producing 1,064 MW. The proposed modification is to remove the existing limitations of the operating hours of the plant contained in the existing plan approval due to the vacature of the greenhouse gas tailoring rule mandated by the U.S. Supreme Court, the department said in a notice of intent to approve this revision in the April 4 Pennsylvania Bulletin.
  • The Federal Energy Regulatory Commission said March 16 that it is working on an environmental assessment on the Sunbury Pipeline Project, which is about 34.5 miles of 20-inch diameter pipeline and related facilities planned by UGI Sunbury LLC to serve this project. Sunbury plans to construct, own, and operate a new natural gas pipeline extending from Lycoming County, Pa., to the Hummel Station project at the existing site of coal-fired Sunbury Generation LP facility.
  • Panda Power Funds announced Feb. 17 that it has entered into a joint venture with Sunbury Generation to develop, finance, construct and operate this project. Hummel Station is expected to be one of the largest coal-to-gas conversion projects in the United States. The new plant is expected to supply large power markets, including Philadelphia and New York City, when it enters commercial operations in the second half of 2017.
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.