| 摘要 |
PROBLEM TO BE SOLVED: To provide a power generation device capable of maintaining a voltage of a DC bus for independent operation during a power failure by surely preventing power that should not be returned to a system, from flowing out to the system when performing solar cell power generation and battery discharge.SOLUTION: A power generation device comprises: a battery which is connected to a DC bus and maintains a DC bus voltage constant; a solar cell; a DC/DC converter which converts output of the solar cell and is connected to the DC bus; a bidirectional AC/DC converter which is connected between the DC bus and a system and converts DC power and AC power; an AC measuring part for measuring AC load power of an AC load connected to the system; and an arithmetic part for calculating control power of the AC/DC converter. The arithmetic part controls AC output power of the AC/DC converter equal to or less than (solar cell power+AC measurement power) and causes the solar cell power to flow inversely to the system. |
