PJM files interconnect deal for repowered Sunbury coal plant

PJM Interconnection on March 6 filed at the Federal Energy Regulatory Commission an executed interconnection service agreement (ISA) among PJM, Corona Power LLC and transmission owner PPL Electric Utilities related to a gas-fired repowering of the coal-fired Sunbury power plant.

The Corona Power ISA facilitates the interconnection to the PJM transmission system of an increase of 643 MW (Maximum Facility Output) at the Sunbury Generation Facility located in Shamokin Dam, Pa. The Corona Power ISA indicates that Corona Power shall have capacity interconnection rights (CIRs) in the amount of 227 MW for Unit 5; 208 MW for Unit 6; and 208 MW for Unit 7. These are three new gas combustion generators. Under the ISA, on or before June 1, 2016, Corona Power must demonstrate commercial operation of all generating units.

The filing with FERC shows this project is under two queue numbers, X2-025 and X4-019.

  • An October 2013 facilities study from PJM for X2-025 says: “Queue X2-025 is a Corona Power LLC request to interconnect a 416 MW Energy (416 MW Capacity) Resource consisting of two natural gas fired turbines (new Units 6 & 7) and two heat recovery steam generators (HRSGs). The HRSGs will be used to re-power the existing Sunbury Units 1, 2. Queue X2-025 is located in Monroe Township, Snyder County at the existing Sunbury power plant property.”
  • A separate facilities study from October 2013 for the other queue position says: “Queue X4-019 is a Corona Power LLC request to interconnect a 227 MW Energy (227 MW Capacity) Resource consisting of one natural gas fired turbine (new Unit 5) and one heat recovery steam generator (HRSGs). The HRSGs will be used to re-power the existing Sunbury Unit 4. Queue X4-019 is located in Monroe Township, Snyder County at the existing Sunbury power plant property.”

The project contact is: Corona Power LLC c/o Sunbury Generation LP, Old Trail Road, Shamokin Dam, PA 17876, Attn: Jeff Specht.

There have been requests to deactivate Units 1-4 at the coal-fired Sunbury plant in central Pennsylvania, with all four units projected to be deactivated by June 1, 2015. That is according to a list of pending deactivation requests from PJM updated to Feb. 18. The Sunbury coal units are: Unit 1 (80 MW); Unit 2 (80 MW); Unit 3 (94 MW) and Unit 4 (128 MW).

The Pennsylvania Department of Environmental Protection said in April 2013 that it had issued a final air permit to Sunbury Generation LP for a coal-to-gas conversion project at the Sunbury power plant. The new air permit covers a natural gas-fired combined-cycle power plant to produce approximately 1,064 MW (gross) or less of electricity.

“The project consists of three identical F class combustion gas turbines set up in a 2X3 and 1X1 configuration,” said a DEP notice. “Each combined-cycle turbine will also include a heat recovery steam generator and supplemental duct burners. The project also consists of the construction of a 106 MMBTU/hr natural gas fired auxiliary boiler and 15 MMBTU/hr natural gas fired heater. As part of the project, the facility’s coal fired utility boilers are being permanently retired.”

A separate fact sheet from the DEP said that Sunbury Generation LP’s existing facility has a net generating capacity of 438 MW and consumes up to 1.3 million tons of Pennsylvania coal and 1.5 million gallons of fuel oil each year. Electricity generated at the four-unit station is sold into the bulk electric market into the PJM transmission system.

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.