| 摘要 |
PURPOSE:To perform cost reduction, to facilitate installation and maintenance work, to prevent electric poles from concentrating, and to prevent a power distribution system from being reversely charged by the output of a scattered power system. CONSTITUTION:This reverse charging prevention system has a capacitor connecting switch 17 which is closed by a tripping signal for a circuit-breaker 3 provided in a substation 2 of the feeding power source of a power distribution system 1, and a phase advancing capacitor 18 which is set to a capacitance larger than the output capacity of the scattered power sources 8 of the whole of the power distribution system 1, and brings the whole of the power distribution system 1 into a load unbalanced state by being connected between the circuit-breaker 3 and a first section switch 4 by the making of the capacitor connecting switch 17. And reverse charging is prevented by stopping the power feeding of a scattered power source 8, when the power distribution system 1 becomes in the load unbalanced state and it is detected by the system malfunction detecting function of the scattered power source 8. |
