Patent ID: 8487467

Claim:
A method for operating a gas and steam turbine system, comprising: providing a frequency converter assigned to a starting device of a gas turbine and a first generator assigned to a steam turbine wherein the starting device also includes a second generator which is connected to an electricity network via a frequency transformer and wherein the first generator is connected to the electricity. network via a transformer; connecting the frequency converter for starting the gas turbine to the starting device; generating electricity by the frequency converter with a corresponding frequency from the electricity network; connecting the frequency converter to the first generator after the gas turbine is started; and decoupling the first generator from the electricity network via the transformer, wherein electrical power of the first generator is fed into the electricity network by way of the frequency converter, and wherein the steam turbine is designed with a plurality of stages and power is fed by way of the frequency converter during a bridging of a high pressure stage of the steam turbine on a steam side.