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US 12,188,411 B2Granted
State determining device, operation controlling device, gas turbine, and state determining method
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTakashi Sonoda, Ryuji Takenaka, Sosuke Nakamura
Life of this patent
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Abstract
A state determining device determines a state of a gas turbine connected to an electric generator. The gas turbine includes a compressor that compresses intake air into compression air, a fuel supply device that supplies fuel, a combustor that mixes the compression air supplied from the compressor and the fuel supplied from the fuel supply device and combusts a resultant mixture to generate combustion gas, and a turbine that is rotated with the generated combustion gas.
Claims8
A controlling device comprising:
- a state determining device that determines a state of a gas turbine connected to an electric generator, the gas turbine comprising a compressor that compresses intake air into compression air, a fuel supply device that supplies fuel, a combustor that mixes the compression air supplied from the compressor and the fuel supplied from the fuel supply device and combusts a resultant mixture to generate combustion gas, and a turbine that is rotated with the generated combustion gas,
- the state determining device including:
- a hardware processor configured to
- detect a change rate of a fuel-flow instruction value of fuel to be supplied from the fuel supply device to the combustor,
- detect a change rate of an output of the electric generator, and
- determine whether the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator are proportional to each other based on the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator;
- wherein the controlling device is configured to control the gas turbine based on the fuel-flow instruction value and the output of the electric generator, and
- wherein the controlling device includes a turbine-inlet-temperature calculating unit configured to calculate an estimation value of a turbine inlet temperature based on a value of the output of the electric generator,
- the controlling device changes a value of a detected output of the electric generator to a value with smaller fluctuation when the state determining device has determined that an operation of the gas turbine departs from a predetermined relation, and
- the turbine-inlet-temperature calculating unit calculates the estimation value of the turbine inlet temperature based on the changed value with a smaller fluctuation.
7 more elements
A control device, comprising:
- a state determining device that determines a state of a gas turbine connected to an electric generator, the gas turbine comprising a compressor that compresses intake air into compression air, a fuel supply device that supplies fuel, a combustor that mixes the compression air supplied from the compressor and the fuel supplied from the fuel supply device and combusts a resultant mixture to generate combustion gas, and a turbine that is rotated with the generated combustion gas,
- the state determining device including:
- a hardware processor configured to
- detect a change rate of a fuel-flow instruction value of fuel to be supplied from the fuel supply device to the combustor,
- detect a change rate of an output of the electric generator, and
- determine whether the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator are proportional to each other based on the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator;
- wherein the controlling device is configured to control the gas turbine based on the fuel-flow instruction value and the output of the electric generator, and
- wherein the controlling device includes a turbine-inlet-temperature calculating unit configured to calculate an estimation value of a turbine inlet temperature based on a value of the output of the electric generator, and
- the turbine-inlet-temperature calculating unit uses, when the state determining device determines that the operation of the gas turbine departs from a relation in which the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator are proportional to each other, a fuel-flow instruction value that is before a predetermined time for a value of the output of the electric generator to calculate the estimation value of the turbine inlet temperature.
6 more elements
A control device, comprising:
- a state determining device that determines a state of a gas turbine connected to an electric generator, the gas turbine comprising a compressor that compresses intake air into compression air, a fuel supply device that supplies fuel, a combustor that mixes the compression air supplied from the compressor and the fuel supplied from the fuel supply device and combusts a resultant mixture to generate combustion gas, and a turbine that is rotated with the generated combustion gas,
- the state determining device including:
- a hardware processor configured to
- detect a change rate of a fuel-flow instruction value of fuel to be supplied from the fuel supply device to the combustor,
- detect a change rate of an output of the electric generator, and
- determine whether the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator are proportional to each other based on the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator;
- wherein the controlling device configured to control the gas turbine based on the fuel-flow instruction value and the output of the electric generator, and
- wherein the controlling device includes a turbine-inlet-temperature calculating unit configured to calculate an estimation value of a turbine inlet temperature based on a value of the output of the electric generator, and
- the turbine-inlet-temperature calculating unit changes, when the state determining device determines that the operation of the gas turbine departs from a relation in which the change rate of the fuel-flow instruction value and the change rate of the output of the electric generator are proportional to each other, a calculated estimation value of the turbine inlet temperature to a value with smaller fluctuation based on a value of the output of the electric generator.
6 more elements
Dependencies are inferred from the claim text.