At present, the detection technology for single-phase grounding faults in small current grounding systems has gradually matured, and the on-site application effect is gradually improving. However, there is relatively little research on the consecutive grounding faults at two points across the line. This article focuses on the transient characteristics of two consecutive grounding faults with the same and different phases in a small current grounding system. A transient equivalent circuit model is established, and the transient characteristics of single-phase grounding fault lines are analyzed. The variation law of transient characteristics of fault lines with different fault conditions is obtained. Based on this, a cross line two point sequential grounding fault line selection method based on continuous detection of fault transient quantities is proposed, and the correctness and feasibility of the proposed method are verified through digital simulation.
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Xia et al. (2024) studied this question.
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