DISTRIBUTED POWER SUPPLY SYSTEM AND CABLE RUN SWITCHING DEVICE

PROBLEM TO BE SOLVED: To provide a distributed power supply system that effectively utilizes the electric power of a distributed power supply and contributes to stabilization of a power supply system, and its cable run switching device.SOLUTION: When a reverse power flow is allowed, a distributed power supply system brings a system-side breaker 41a capable of breaking reception/transmission of power from/to a power system W into a connected state, and brings a charging/discharging cable run breaker 43a capable of breaking charge/discharge of an energy storage device 3 into a disconnected state. When the reverse power flow is disallowed, the distributed power supply system brings the system-side breaker 41a into the disconnected state, and the charging/discharging cable run breaker 43a into the connected state, to charge the electric power of the distributed power supply 2 to the energy storage device 3, and to supply electric power from the power system to power consumption means 5. When the disallowed reverse power flow becomes allowed, the distributed power supply system brings the system-side breaker 41a into the connected state, and the charging/discharging cable run breaker 43a into the connected state to cause the reverse power flow from the distributed power supply 2 to the power system W and to supply electric power from the energy storage device 3 to the power consumption means 5.