Control device, control method, and program

A control device for adjusting an amount of fuel to be supplied to a gas turbine based on a rotational speed of the gas turbine such that a frequency of electric power output by a power generator that generates electric power using the gas turbine is within a given range, the control device comprising:

• a load value acquisition unit configured to acquire a load value that is a value of a load applied to the power generator after cutoff of a part of the load applied to the power generator when the part of the load applied to the power generator is cut off;
• an arithmetic unit configured to calculate an adjusted value that is a value of the load different from the load value by carrying out an arithmetic operation on the load value and a bias;
• and
• a command unit configured to adjust the amount of fuel by outputting a first signal for causing the power generator to output electric power corresponding to the adjusted value,
• wherein, after the first signal is output, the command unit adjusts the amount of fuel by outputting a second signal which is a signal for changing the electric power output by the power generator from a value corresponding to the adjusted value to a value corresponding to the load value over time,
• the adjusted value is less than the load value,
• the command unit outputs the first signal so that the fuel with an amount based on the adjusted value that is less than an amount based on the load value is supplied to the gas turbine and the power generator is caused to output electric power corresponding to the adjusted value that is lower than electric power corresponding to the load value, and
• after the first signal is output, the command unit outputs the second value so that an amount of fuel corresponding to the bias gradually becomes zero, the amount of fuel supplied to the gas turbine is gradually changed from the amount based on the adjusted value to the amount based on the load value, and the electric power output by the power generator is changed from the value corresponding to the adjusted value to the value corresponding to the load value over time.