Fault restoration method and system of power distribution system with distributed generation based on power conversion system

摘要

In the failure recovery method in the failure recovery system of a distribution system including a distributed power supply, recloser, and control device based on a power conversion device of the present invention, when it is determined that a fault current has occurred in the distribution system, the recloser opens the line. The step of, while the recloser opens the line, the control device maintains the output without stopping the operation of the distributed power supply so that the distributed power supply operates independently, and the recloser performs a recloser operation and fails. If it is determined that there is no current, it includes the step of returning to the distribution system again. According to the present invention, when an instantaneous accident occurs in a distribution system in which a distributed power source based on a power conversion device is introduced, the distributed power supply can be operated independently, thereby preventing an output discontinuity of the distributed power supply, and in the case of a permanent failure, an open point with other substations It has the effect of maintaining the output of the distributed power supply by connecting it.