Control device for gas turbines, gas turbine equipment, and gas turbine control method

Abstract

The present invention provides a control device for a gas turbine, a gas turbine system, and a gas turbine control method that can suppress damage to the flow divider. [Solution] A control device for a gas turbine is a control device for controlling a gas turbine which includes a fuel line and a flow divider provided in the fuel line for distributing the fuel in the fuel line to a plurality of fuel nozzles, comprising: a state value acquisition unit configured to acquire a state value that changes according to the output of the gas turbine; a threshold acquisition unit configured to acquire a threshold for comparison with the state value; and a signal output unit configured to output a signal to protect the flow divider when the state value falls below the threshold.

Claims

1. A control device for controlling a gas turbine, which includes a fuel line and a flow divider provided in the fuel line for distributing the fuel in the fuel line to a plurality of fuel nozzles, A state value acquisition unit configured to acquire a state value that changes according to the output of the gas turbine, A threshold acquisition unit configured to acquire a threshold value for comparison with the aforementioned state value, A signal output unit configured to output a signal to protect the flow divider when the state value falls below the threshold, A control device for a gas turbine equipped with the following features.

2. The state value acquisition unit is configured to acquire the flow rate of the fuel in the fuel line as the state value. The control device for a gas turbine according to claim 1.

3. The state value acquisition unit is configured to acquire the rotational speed of the flow divider as the state value. The control device for a gas turbine according to claim 1.

4. The signal output unit is configured to output a signal for stopping the gas turbine as the signal. A control device for a gas turbine according to any one of claims 1 to 3.

5. The threshold value is a value that changes according to the output of the gas turbine. The threshold acquisition unit is configured to acquire the threshold corresponding to the output of the gas turbine. A control device for a gas turbine according to any one of claims 1 to 3.

6. The state value acquisition unit is configured to acquire the flow rate of the fuel in the fuel line as the state value. The threshold increases as the output of the gas turbine increases. The control device for a gas turbine according to claim 5.

7. The state value acquisition unit is configured to acquire the rotational speed of the flow divider as the state value. The threshold increases as the output of the gas turbine increases. The control device for a gas turbine according to claim 5.

8. Combustor and A fuel line for supplying fuel to the aforementioned combustor, A flow divider provided in the fuel line for distributing the fuel in the fuel line to a plurality of fuel nozzles, A turbine configured to be driven by combustion gas from the aforementioned combustor, A gas turbine including, A control device according to any one of claims 1 to 3 for controlling the gas turbine, A gas turbine facility equipped with the following features.

9. The system includes at least one of the following: a flow meter for measuring the flow rate of the fuel in the fuel line, or a tachometer for measuring the rotational speed of the flow divider. The gas turbine equipment according to claim 8.

10. A control method for controlling a gas turbine, which includes a fuel line and a flow divider provided in the fuel line for distributing the fuel in the fuel line to a plurality of fuel nozzles, The steps include: acquiring a state value that changes according to the output of the gas turbine; The steps include: performing an operation to protect the flow divider when the aforementioned state value falls below a threshold; A control method for a gas turbine equipped with the following features.

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