Patent ID: 8396643

Claim:
A gas turbine control device, 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, wherein said state grasping unit includes a data table configured to store therein a history indicating a relation between the fuel composition or the heat capacity of the fuel and combustion oscillation of the combustor, and said countermeasure determining unit determines a relation between the fuel composition or the heat capacity of the fuel and the current state of operation of the gas turbine based on the history.