| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power supply system whose autonomous operation switcher can be simply introduced additionally to an existing dwelling house.SOLUTION: A power supply system supplies power to a load in a dwelling house from natural energy of a photovoltaic power generation unit and electric energy of a power storage unit while interconnecting with a system, and can continuously supply power to a load in the dwelling house being used during system interconnection when the system is interrupted. The power supply system comprises an autonomous operation switcher having one frame which includes: a first terminal to which the system is connected; a second terminal to which a power distribution panel is connected; an earth leakage breaker which receives power from the system through the first terminal; an electromagnetic contactor for disconnecting the second terminal side from the system when interruption of power supply occurs; a first breaker for connecting the photovoltaic power generation unit to the second terminal; a second breaker for connecting a power converter in the power storage unit to the second terminal; and a current transformer for detecting inverse load flow from the power storage unit to the first terminal side. |
