| abstract |
The voltage of the fuel cell is maintained at a desired voltage to suppress the voltage fluctuation, including when the load demand is small. In a power supply system (30) including a fuel cell (100), at least a part of the required power is supplied from a fuel cell when in a normal load condition. In the low load state, the amount of oxygen supplied to the fuel cell is smaller than the amount of oxygen supplied to the fuel cell in the normal load state, and the amount of oxygen required to bring the voltage of the fuel cell to the target voltage set in advance is supplied to the fuel cell. In the first low load state, the first target voltage is set as the target voltage to supply oxygen to the fuel cell. Thereafter, the requested power exceeds the reference value, and the output voltage exceeding the first target voltage The second target voltage higher than the first target voltage is set as the target voltage and oxygen is supplied to the fuel cell. |