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A Fault Diagnosis Method for Single Phase Break in Distribution Network Based on Multi-Voltage-Level Information Fusion

The single-phase break fault is one of the common faults in distribution network. When a line breaks down, the change of voltage and current is not obvious before fault point. Especially for the branch-line-break fault which happens very frequently, the change of voltage and current along the whole trunk line is not obvious and it's difficult to find the fault point. This paper focuses on fault location for four types of single-phase break fault. Symmetrical component method is firstly used to analyze fault characteristics, and then the fault diagnosis method based on multi-voltage-level information fusion is proposed accordingly, which could locate both trunk line fault and branch line fault. Finally, the effectiveness of the proposed method is verified by simulation analysis.