Combined cycle power generation plant operating more stably on load change
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsAkihiko Saitoh, Takashi Sonoda, Shouichi Nagata, Teruo Tateishi
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Abstract
A combined cycle power generation plant includes a gas turbine operating in response to a turbine control signal and a speed control apparatus which outputs the turbine control signal to the gas turbine based on a speed governor control signal for a first time period after an operation of the plant is switched to a system isolated operation. The speed governor control signal is a signal for speed control of the gas turbine, and a switching signal is generated when the operation of the plant is switched to the system isolated operation.
Claims20
A combined cycle power generation plant comprising:
- a gas turbine operating in response to a turbine control signal;
- and
- a speed control apparatus which outputs said turbine control signal to said gas turbine based on a speed governor control signal for a first time period after an operation of said plant is switched to a system isolated operation, and
- said speed governor control signal is a signal for speed control of said gas turbine, and a switching signal is generated when the operation of said plant is switched to said system isolated operation.
A combined cycle power generation plant comprising:
- a gas turbine;
- a load limit control circuit which outputs a load limit control signal to control speed of said gas turbine;
- a speed governor control circuit which outputs a speed governor control signal to control the speed of said gas turbine;
- and
- a minimum value selector which selects said speed governor control signal from among said load limit control signal and said speed governor control signal for a time period after switching to a system isolated operation of said plant, and
- said speed governor control signal is lower than said load limit control signal in level, and a system isolated operation signal is generated when an operation of said plant is switched to the system isolated operation.
Dependencies are inferred from the claim text.