POWER CONTROL DEVICE AND POWER CONTROL METHOD

摘要

The present invention more reliably prevents power of different voltages flowing in the same path. A solar panel power conditioning system (21) converts DC voltage power generated by a solar panel, which generates electricity in response to irradiation with sunlight, into AC voltage power. A charger AC/DC converter (23) converts the AC voltage power output from the solar panel power conditioning system (21) into DC voltage power. Relays (31, 32) are connected in series to wiring that supplies power from a system to the charger AC/DC converter (23). Furthermore, a control unit (28) switches the relays (31, 32) off when an interruption in the supply of power from the system is detected. This invention can be applied, for instance, to a photovoltaic system provided with a photovoltaic panel and a storage battery.