Patent ID: 8349505

Claim:
A control method of a fuel cell power generation system, the fuel cell power generation system including a hydrogen supply unit which generates reaction gas including hydrogen, an oxygen supply unit, a fuel cell that receives hydrogen from the hydrogen supply unit and oxygen from the oxygen supply unit, and that generates electric power, a temperature sensor that detects a temperature of the hydrogen supply unit, and a temperature control unit that controls power generated by the fuel cell, so that the temperature detected by the temperature sensor is held within a predetermined range, said temperature control unit configured to perform the control method comprising the steps of: defining a first target power value, and a second target power value lower than the first target power value, as target values of the power generated by the fuel cell; when the detected temperature exceeds a first scheduled temperature, setting the target value of the power generated by the fuel cell to the first target power value, and also setting a response speed of the setting of the target value according to a rate of change of the detected temperature of the hydrogen supply unit; and when the detected temperature falls below a second scheduled temperature that is lower than the first scheduled temperature, setting the target value of the power generated by the fuel cell to the second target power value, and also setting a response speed according to a rate of change of the detected temperature of the hydrogen supply unit.