Abstract:

In the fault recovery process of distribution network with distributed generation, power supply for some isolated circuits and loads can not be recovered. In order to solve these problems effectively, the depthfirstsearch algorithm should be improved to achieve the accurate partition for isolated islands. Then, according to the theory of loopbreaking operation, the binary particle swarm optimization algorithm was used to find the best switch combination in the residual distribution network, and to achieve fault reconfiguration. Finally, an case study on an IEEE33 bus system was made and validated by Matpower software. The load restoration rate was used to evaluate the recovery effect of the proposed scheme. By comparing the results of several cases, the effectiveness of the proposed scheme is verified.

Key words: distributed generation;distribution network, fault recovery；improved depthfirstsearch algorithm；loopbreaking operation；Matpower software；restoration rate