An Adaptive Fault-line Selection Method based on Multi-criteria Fusion of Single-phase Grounding Fault in Small Current Grounding System

Based on the detailed analysis of single-phase grounding fault characteristics in the small current grounding system, an adaptive multi-criteria fusion method of fault-line selection based on transient signal is proposed in this paper. This method introduces fault membership and criterion confidence to achieve the fusion of multiple fault-line selection criteria. At the same time, each criterion adaptively determines whether to participate in the selection according to its confidence level. MATLAB/Simulink simulation results indicate that this fault-line selection method is not influenced by such factors as the transient characteristics of the fault, fault resistance, length of the faulty line, etc.