Power Authority

The gas turbine at the Jamestown Board of Public Utilities used to produce electricity for the city has a new control system.

Last month, the new control system was installed on the General Electric LM6000 gas turbine. David Gustafson, BPU electric and gas resource manager, said the new control system had to be installed because General Electric was switching to new equipment. Because of General Electric switch, the BPU had to follow suit as well. This way they could continue to receive replacement parts and service from GE on the turbine’s control system because it was no longer being providing on the older system. The project costs the BPU around $700,000, which also included new fuel and hydraulic valves.

Steven Kulig, BPU power plant manager, said GE had been phasing out the old control system for about five years. Kulig said BPU employees worked on the switch for about eight months from the first proposal to reviewing the new system to board approval. He said installation of the new control system at the BPU took about two weeks.

Kulig said BPU employees now have tighter control of the LM6000 with the new system. The General Electric LM6000 turbine generator is modified to produce mechanical torque as opposed to thrust. The engine is similar to what is on the wing of a large jet aircraft.

The turbine is coupled to a Deltak heat recovery steam generator which uses exhaust heat from the LM6000, and some additional gas firing, to produce steam to power a steam turbine generator. The gas turbine can be run in simple cycle, with the heat recovery steam generator, with an efficient operating range between approximately 21.5 and 43 megawatts. The gas turbine can be run in combined cycle, with the heat recovery steam generator, to add approximately 22 megawatts of additional gas-produced electricity.