GE Hydro has received a contract worth more than $47 million from the US Army Corps of Engineers to refurbish seven vertical Francis turbines and generators at the John H. Kerr Powerhouse in Boydton, Virginia.
According to GE, the five-year project will increase the output of the plant by more than 70 megawatts.
The turbine runner for unit 1 will be refurbished to ensure continued service with an output of nearly 13 megawatts. The remaining units will have new turbine runners installed to increase the output of each of those machines from approximately 33.5 megawatts to more than 45 megawatts.
GE will also supply seven new sets of stator coils and windings. Ratings for the existing generators are 13,333 kva for unit 1 and 35,555 kva for units 2-7. Following the refurbishment, the rating for unit 1 will remain the same while the ratings for the other six units will increase to 52,000 kva.
The scope of the GE Hydro contract also includes turbine model testing, electrical balance-of-plant equipment, and seven new governors to be provided by GE Global Control Systems.
As a key part of the contract, a turbine aeration system will be installed to increase the dissolved oxygen (DO) content in the water being discharged from the turbines. The increased dissolved oxygen will reportedly benefit the living organisms downstream of the power plant by increasing the amount of oxygen available in the waterway.
The first refurbished unit is scheduled to resume commercial service by the end of 2004, with all seven units to be commissioned by November of 2007.