Abstract
Incipient faults are precursors to permanent faults. The location of incipient faults can effectively prevent permanent faults and reduce the losses caused by faults. In this paper, the Mary fault model is used to simulate the incipient faults by using the arc gap theory to study the incipient fault current and voltage waveform characteristics. An incipient fault location algorithm is proposed on the fault voltage and current waveform characteristics. The line reactance and fault location are obtained by least squares method. Optimizing the algorithm reduces the amount of computation and preprocessing the results to reduce the interference of the error. Finally, a 10kV single-core cable model was built by PSCAD/EMTDC to verify the reliability of the algorithm.
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