Combustion turbine stations

Great River Energy owns and operates four combustion turbine plants located to the north and west of the Twin Cities area.

These units, like Pleasant Valley and Lakefield Junction Stations, are simple-cycle combustion turbines. The combustion turbine stations are staffed with three skilled operator technicians who operate and maintain the four stations. These facilities run on fuel oil.

St. Bonifacius Station

Location: St. Bonifacius, Minn.
Generating capability: 56 MW (summer)
Fuel source: Fuel oil
Turbine generator: Two aero-derivative combustion turbines manufactured by Pratt & Whitney coupled to a single generator. Can operate a number of hours in synchronous condenser mode which allows the plant to carry operating reserves as well as voltage support for the electrical grid. The turbines at St. Bonfacius were originally developed as large aircraft engines which were modified to provide power generation.

Rock Lake Station

Location: Pine City, Minn.
Generating capability: 21 MW (summer)
Fuel source: Fuel oil
Turbine Generator: One combustion turbine manufactured by GE (MS5001)

Maple Lake Station

Location: Maple Lake, Minn.
Generating capability: 19 MW (summer)
Fuel source: Fuel oil
Turbine generator: One combustion turbine manufactured by GE (MS5001)

Cambridge Station – Unit 1

Location: Cambridge, Minn.
Generating capability: Unit 1: 21 MW (summer)
Fuel source: Fuel oil
Turbine generators: Two combustion turbines, Unit 1 manufactured by GE (MS5001)
Project site: 23 acres