利用智能软开关探测的配电线路相间永久性故障识别方法OA

The automatic reclosing of the distribution line without distinguishing the nature of fault will bring a secondary impact during a permanent fault.Therefore,this paper proposes a permanent fault identification method of distribution line based on soft open point(SOP)detection in a flexible interconnected distribution network.Firstly,a phase-to-phase permanent fault identification model of the distribution line and its applicable frequency band are given.Further,the control strategy of SOP is designed based on the analysis of the signaling requirements for solving the permanent fault model.Then,based on the idea of model identification,a permanent fault identification method of distribution line using the similarity of voltage structure is proposed,and the fault isolation and power supply restoration scheme with the cooperation of SOP is constructed.Finally,the proposed method is simulated and verified using PSCAD,and experimental validation was carried out.The results show that the proposed method can correctly identify the nature of the fault and locate the fault section.