초록 ▼

A power plant includes a gas turbine coupled to an electric generator. The electric generator can be connected to a high-voltage network through a generator switch and can be operated as a motor for the start-up of the gas turbine. The electric generator can also be connected to a static starting de

A power plant includes a gas turbine coupled to an electric generator. The electric generator can be connected to a high-voltage network through a generator switch and can be operated as a motor for the start-up of the gas turbine. The electric generator can also be connected to a static starting device for the run-up of the gas turbine. The static starting device is connected to a medium-voltage network which is provided for the auxiliary service of the power plant. The auxiliary voltage, provided in another way, of the medium-voltage network, produces a variable supply voltage for the generator operated as a motor. In such a plant, reduced circuit complexity is achieved by the fact that the static starting device is designed in such a way or can be activated in such a way that, after the run-up of the gas turbine, the static starting device itself produces the auxiliary voltage of the medium-voltage network from the voltage delivered by the generator.

대표청구항 ▼

1. A power plant comprising: a gas turbine; an electric generator coupled to said gas turbine, said electric generator being connectable to a high-voltage network through a generator switch, said electric generator being operable as a motor for the start-up of the gas turbine; a static starting

1. A power plant comprising: a gas turbine; an electric generator coupled to said gas turbine, said electric generator being connectable to a high-voltage network through a generator switch, said electric generator being operable as a motor for the start-up of the gas turbine; a static starting device; and means for connecting the static starting device between a medium-voltage network and the generator so that the static starting device a) provides electricity from the medium voltage network to the generator when the generator is operating as a motor to run-up the gas turbine, and b) provides electricity from the generator to the medium voltage network after the run-up of the gas turbine. 2. The power plant as claimed in claim 1, wherein the static starting device is designed as a converter which is constructed with power semiconductors and is operable in both directions. 3. The power plant as claimed in claim 1, wherein, to produce the auxiliary voltage of the medium-voltage network during the run-up of the gas turbine, an auxiliary generator is connectable to the medium-voltage network. 4. The power plant as claimed in claim 1, wherein the static starting device is connected to the medium-voltage network through a transformer and a switch. 5. The power plant as claimed in claim 1, wherein means are provided for controlling the static starting device, said means keeping the auxiliary voltage produced by the static starting device on the medium-voltage network constant during operation of the gas turbine. 6. A method of operating a power plant, the power plant comprising a gas turbine coupled to an electric generator, said electric generator being connectable to a high-voltage network through a generator switch, said electric generator being operable as a motor for the start-up of the gas turbine and connectable to a static starting device for the run-up of the gas turbine, said static starting device being connected to a medium-voltage network and providing auxiliary voltage for service of auxiliary components of the power plant, said auxiliary voltage of the medium-voltage network also producing a variable supply voltage for the generator when said generator is operated as a motor, wherein in the static starting device, the auxiliary voltage of the medium-voltage network is produced from the voltage delivered by the generator, the method comprising: keeping said generator switch open and using said generator as a drive for the gas turbine to run the gas turbine up; producing the supply voltage required by the generator with the static starting device from the auxiliary voltage of the medium-voltage network; after the run-up of the gas turbine, closing the generator switch and producing the auxiliary voltage of the medium-voltage network with the static starting device from the generator voltage delivered by the generator with small tolerances within all load ranges. 7. The method as claimed in claim 6, further comprising: producing the auxiliary voltage required during the run-up of the gas turbine with an auxiliary generator connected to the medium-voltage network and shutting down the auxiliary generator after the run-up has been completed. 8. The method as claimed in claim 6, further comprising: keeping the auxiliary voltage produced by the static starting device constant after the run-up of the gas turbine and during normal operation by controlling the activation of the static starting device. 9. The power plant as claimed in claim 3, wherein the auxiliary generator is a diesel generator.