Patent ID: 8247919
Filing Date: 2012-08-21
Classification: F01K,Y02E

Abstract:
1. A method of operating a power plant, the method comprising: providing at least one power train having at least one steam turbine and a second AC generator; providing at least one power train having at least one gas turbine and a first AC generator; providing a frequency converter between the first AC generator and a power grid having a given grid frequency, wherein the frequency converter comprises a variable electronic gear unit; connecting the outputs of the first AC generator and the second AC generator to the power grid; directly driving the first AC generator with the at least one gas turbine at an operating frequency; directly driving the second AC generator with the at least one steam turbine; forcing a speed with the variable electronic gear unit onto the at least one gas turbine with a transmission ratio between the mechanical speed of the at least one gas turbine and the grid frequency via the first AC generator; and directly frequency coupling the second AC generator to said power grid.