| 摘要 |
PROBLEM TO BE SOLVED: To provide switching controller and control method of distribution system in which unnecessary opening of a load-break switch due to overcurrent of reverse power flow occurring upon service interruption of a distribution line due to some cause can be suppressed. SOLUTION: When a power flow direction decision section 34 decides reverse power flow, a voltage detection signal of an incoming line 13 arranged with a load-break switch 16 is outputted artificially to an overcurrent detecting section 32 even when the voltage of the incoming line 13 (i.e. control power supply) disappears. Consequently, no-voltage state of the distribution line 11 and the incoming line 13 is not detected at the overcurrent detecting section 32 even if reverse power flow from a distributed power supply 15 is regarded as overcurrent and detected and the distributed power supply 15 is stopped. Open operation (SO operation) of the load-break switch 16 is thereby locked and throw-in state is sustained. COPYRIGHT: (C)2006,JPO&NCIPI
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