| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply system that can rationally use a power supply from a power generation unit even if a commercial power supply stops supplying power.SOLUTION: The power supply system having a power generation unit 1, a power storage unit 3 and a power supply circuit comprises: a bidirectional converter 23 for stepping up an input voltage to the power storage unit 3 when the power storage unit 3 stores power; and a controller 7 for controlling the power storage unit 3. While power supply from a commercial power supply 2 is interrupted, the power generation unit 1 supplies power in a state of connection to a self-sustaining operation circuit Rb separate from the commercial power supply 2, and the power storage unit 3 is connected to the self-sustaining operation circuit Rb via the bidirectional converter 23 so as to store a power supply from the power generation unit 1 and is controlled to, if the power supply from the power generation unit 1 is greater than a power demand at a load 4, store the surplus power unconsumed at the load 4. |
