Patent ID: 6960400

Claim:
A fuel cell power generation system comprising: a fuel cell that serves as a first power source for generating power upon receipt of fuel supply; a direct-current adjusting unit capable of adjusting a direct current generated by the fuel cell into a direct current controlled at one of a target voltage, a target current, and a target power; a first power supply unit that supplies power to a power line extending between a second power source and a load using the adjusted direct current; a second power supply unit that supplies a predetermined direct current power to an accessory that is driven by the predetermined direct current power using the adjusted direct current output; a power failure detecting unit that detects power failure of the second power source; and a controller that controls: the direct-current adjusting unit such that the direct current generated by the fuel cell is adjusted to the direct current controlled at one of the target voltage, target current and target power on the basis of a required load when the power failure of the second power source is not detected by the power failure detecting unit, and the direct-current adjusting unit such that the direct current generated by the fuel cell is adjusted to a value corresponding to a direct current at the target voltage established for the power failure when the power failure of the second power source is detected by the power failure detecting unit; wherein the first power supply unit interrupts the power supply to the power line and the fuel cell performs the power generation based on a power needed to operate the accessory during the power failure of the second power source.