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To solve the problems of inaccurate location caused by unsynchronized measurement signals, high impedance grounding, and strong noise interference, in this paper, a novel fault location method based on the relationship between transient zero-mode current and transient phase current is proposed. Through analysis, the zero phenomenon is the main cause of misjudgment. The three-phase current of fault feeder detection point is obtained, the similarity between fault phase current and fault transient zero-mode current is calculated, and the segment location is conducted by using dichotomy method. Numerical simulation results demonstrate the effectiveness of the proposed method. This method can greatly reduce the probability of misjudgment and measurement difficulties, and improve detection efficiency.

Fault Zone Location Based on Transient Phase Current and Zero Mode Current