Multi-Objective Optimal Configuration of Multiple Switchgear Considering Distribution Network Fault Reconfiguration

摘要

The power supply and distribution network of prosumer group is equipped with contact switch and section switch. After feeder fault occurs, the topological structure of distribution network can be adjusted by changing the switch state of each switch in the system, so as to realize the reconstruction after the fault, so as to restore the power supply in the fault free area. The optimal configuration of different types of switchgear in the appropriate position of the distribution network can reduce the time of fault location and isolation, and further realize the reconfiguration of the distribution network after the fault occurs, which greatly improves the reliability of the power supply and distribution network for prosumer group. This paper introduces a series of Boolean expressions to describe the existence of switches in distribution network, and then determines the corresponding load interruption time according to different fault types. On this basis, a distribution network fault reconfiguration model is established. By minimizing the investment cost and network loss, a multi-objective optimization model with power supply reliability as the index is established. Finally, the proposed model is tested through the RBIs bus 4 network. The test results show that the solution can effectively reduce the investment cost, improve the reliability of the distribution network, and maximize the investment income.