GAS TURBINE CONTROL DEVICE AND GAS TURBINE SYSTEM
First Claim
1. A gas turbine control device characterized by comprising:
- a frequency analyzing unit for performing a frequency analysis of combustion oscillation in a combustor of a gas turbine and for splitting a result of this frequency analysis into a plurality of frequency bands;
a fuel characteristic detecting unit for detecting any of a fuel composition and a heat capacity of fuel to be supplied to the combustor;
an inputting unit to which a process value of the gas turbine other than the fuel composition and the heat capacity of the fuel is inputted;
a state grasping unit for checking a current state of operation of the gas turbine by using the result of the frequency analysis split into the frequency bands from the frequency analyzing unit, the process value of the gas turbine from the inputting unit, and any of the fuel composition and the heat capacity of the fuel detected by the fuel characteristic detecting unit;
a countermeasure determining unit for determining an increase or decrease in a flow rate of at least one of a fuel flow rate and an air flow rate to the combustor on the basis of the current state of operation of the gas turbine checked by the state grasping unit; and
an outputting unit for outputting an operation amount corresponding to a countermeasure determined by the countermeasure determining unit,characterized in that a history indicating a relation between the fuel composition or the heat capacity of the fuel and combustion oscillation of the combustor is recorded, andthat a relation between the fuel composition or the heat capacity of the fuel and the current state of operation of the gas turbine is determined based on the history.
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Accused Products
Abstract
An object of the present invention is to provide a gas turbine control device which is capable of performing correction on the basis of a fuel composition of fuel gas to be supplied to a gas turbine, and is capable of changing an amount of correction in response to variation with time of the gas turbine. To attain this, a frequency analyzing unit 25 performs a frequency analysis of combustion oscillation of a combustor and splits a result of the analysis into respective frequency bands. Then, a state grasping unit 22 checks an operating state of the gas turbine on the basis of the result of the analysis of the combustion oscillation and process value of the gas turbine, and corrects the checked operating state on the basis of a fuel composition or a heat capacity of fuel gas measured by a fuel characteristic measuring unit 200. A countermeasure determining unit 23 conducts a countermeasure for controlling an operating action of the gas turbine on the basis of the operating state thus checked.
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Citations
21 Claims
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1. A gas turbine control device characterized by comprising:
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a frequency analyzing unit for performing a frequency analysis of combustion oscillation in a combustor of a gas turbine and for splitting a result of this frequency analysis into a plurality of frequency bands; a fuel characteristic detecting unit for detecting any of a fuel composition and a heat capacity of fuel to be supplied to the combustor; an inputting unit to which a process value of the gas turbine other than the fuel composition and the heat capacity of the fuel is inputted; a state grasping unit for checking a current state of operation of the gas turbine by using the result of the frequency analysis split into the frequency bands from the frequency analyzing unit, the process value of the gas turbine from the inputting unit, and any of the fuel composition and the heat capacity of the fuel detected by the fuel characteristic detecting unit; a countermeasure determining unit for determining an increase or decrease in a flow rate of at least one of a fuel flow rate and an air flow rate to the combustor on the basis of the current state of operation of the gas turbine checked by the state grasping unit; and an outputting unit for outputting an operation amount corresponding to a countermeasure determined by the countermeasure determining unit, characterized in that a history indicating a relation between the fuel composition or the heat capacity of the fuel and combustion oscillation of the combustor is recorded, and that a relation between the fuel composition or the heat capacity of the fuel and the current state of operation of the gas turbine is determined based on the history. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19, 20, 21)
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15. A gas turbine control device characterized by comprising:
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a frequency analyzing unit for performing a frequency analysis of combustion oscillation in a combustor of a gas turbine and for splitting a result of this frequency analysis into a plurality of respective frequency bands; a fuel characteristic estimating unit having a threshold for categorizing a fuel characteristic into a plurality of categories and being configured to compare this threshold with a ratio between an output of the gas turbine and a fuel flow rate of the fuel and to determine which one out of the plurality of categories the fuel characteristic of the fuel corresponds to; an inputting unit to which a process value of the gas turbine other than a fuel composition and a heat capacity of the fuel is inputted; a state grasping unit for checking a current state of operation of the gas turbine by using the result of the frequency analysis split into the respective frequency bands from the frequency analyzing unit, the process value of the gas turbine from the inputting unit, and the category of the fuel characteristic determined by the fuel characteristic estimating unit; a countermeasure determining unit for determining an increase or decrease in a flow rate of at least one of the fuel flow rate and an air flow rate to the combustor on the basis of the current state of operation of the gas turbine checked by the state grasping unit; and an outputting unit for outputting an operation amount corresponding to a countermeasure determined by the countermeasure determining unit, characterized in that a history indicating a relation between the category of the fuel characteristic and combustion oscillation of the combustor is recorded, and that a relation of the current state of operation of the gas turbine corresponding to the category of the fuel characteristic is determined based on the history. - View Dependent Claims (16, 17, 18)
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Specification