基于数学形态法的配电网接地故障定位方法OA

The transient zero sequence current distribution of single-phase grounding fault in distribution network has obvious difference in the upstream and downstream of fault location.A grounding fault loca-tion method for distribution network is proposed.The zero sequence current direction is extracted by Mathematical Morphology(MM),and the path solution domain is divided according to its distribution law,and the path length is used to construct the fitness function for fault location.The Improved Sparrow Search Algorithm(ISSA)was applied to obtain the optimal solution of the fitness function,and the defect easy to fall into the local optimal was solved by integrating Sine-Piece Wise Linear Chaotic Map(SPM),sine-cosine optimization algorithm,dynamic step factor adjustment strategy and spiral search strategy.The convergence process of the algorithm is accelerated,and accurate fault location is realized.Simulation results show that the proposed method can locate faults accurately under different conditions and has good fault tolerance.