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AssigneeGeneral Electric Technology GmbH
InventorsJan Schlesier, Hamid Olia, Martin Schoenenberger
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The disclosure refers to a method for providing a frequency response for a combined cycle power plant connected to an electric grid. The combined cycle power plant includes a gas turbine engine and a steam turbine engine. The steam turbine engine includes a boiler, a steam turbine, a pump, a condenser, a bypass for the steam turbine, a steam admission control valve. The steam turbine engine operates with the bypass closed or at least partly open to supply steam from the boiler to the condenser bypassing the steam turbine, and/or with the steam admission control valve at least partly open. The method comprises regulating the output load of the combined cycle power plant by regulating the steam admission control valve and/or by regulating the steam flow through the bypass in response to a frequency change of the electric grid. The output of the gas turbine can also be adjusted, such that steam generated by the boiler is sufficient to achieve the target load for the steam turbine.
A method for providing a frequency response for a combined cycle power plant connected to an electric grid, wherein the combined cycle power plant comprises a gas turbine engine and a steam turbine engine, the steam turbine engine comprises a boiler providing steam to a steam turbine, a pump, a condenser connected to an output of the steam turbine, a bypass for the steam turbine between the boiler and the condenser, a steam admission control valve, the steam turbine engine operates by manipulating the bypass between the boiler and the condenser and by manipulating the steam admission control valve, the method comprising:
The method of clam 1, wherein further regulation of the output load of the steam turbine engine in the response to a frequency change of the electric grid is carried out by decreasing steam flow through the bypass when the frequency of the electric grid decreases.
Dependencies are inferred from the claim text.