| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage system capable of preventing a switch for parallel off from chattering after a reverse power flow is detected.SOLUTION: A power storage system comprises: a DC/AC inverter 4 which performs DC/AC operation for converting DC input power from power generation means S and a storage battery B to AC output power and outputting the AC output power and AC/DC operation for converting AC input power from a system G to DC output power and outputting the DC output power; a first power line L1 which connects an AC inverter 4 and a specific load R1; a second power line L2 branching from the first power line L1 and connected to a general load R2 and the system G; a reverse power relay RPR; a switch 5 which opens when a reverse power flow is detected in the reverse power relay RPR; and a control unit 7A which controls at least the DC/AC inverter 4. When a reverse power flow is detected in the reverse power relay RPR and the switch 5 opens, the control unit 7A restricts the AC output power so that no reverse power flow is detected in the reverse power relay RPR after the switch 5 closes again. |
