Gas turbine control device and gas turbine control method

A gas turbine control device comprising:

• a frequency analysis unit for outputting a frequency analysis result by performing a frequency analysis on vibration of a pressure or of acceleration inside a combustor of a gas turbine at operating points specified by a process amount of the gas turbine;
• a database for storing the frequency analysis result and the process amount as analysis data for each of the operating points;
• a combustion state prediction unit for predicting a combustion state of the gas turbine by using a prediction model constructed by using the analysis data;
• and
• a correction amount calculation unit for calculating a correction amount to be added to a control signal of the gas turbine to operate the gas turbine at a search candidate point where the combustion state predicted by the state prediction unit falls within a management range, out of search candidate points in which the operating point is a start point, when a search start condition defining an elapse of a waiting time set based on a past search result in an operating point region including the operating point is satisfied.

A gas turbine control method comprising:

• a step of outputting a frequency analysis result by performing a frequency analysis on vibration of a pressure or of acceleration inside a combustor of a gas turbine at operating points specified by a process amount of the gas turbine;
• a step of storing the frequency analysis result and the process amount as analysis data for each of the operating points;
• a step of predicting a combustion state of the gas turbine by using a prediction model constructed by using the analysis data;
• and
• a step of calculating a correction amount to be added to a control signal of the gas turbine to operate the gas turbine at a search candidate point where the combustion state predicted by the state prediction unit falls within a management range, out of search candidate points in which the operating point is a start point, when a search start condition defining an elapse of a waiting time set based on a past search result in an operating point region including the operating point is satisfied.