Electronic Science and Technology ›› 2022, Vol. 35 ›› Issue (7): 64-70.doi: 10.16180/j.cnki.issn1007-7820.2022.07.011

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Fault Voting Method Based on Transient High Frequency Components

WU Jun1,XIE Yifei2,ZHANG Changsen1   

  1. 1. School of Physics and Electronic Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China
    2. School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China
  • Online:2022-07-15 Published:2022-08-16


In view of the problems of extraction and processing of transient line selection characteristics of single-phase grounding faults in existing low-current systems, as well as line selection accuracy, this study analyzes the transient characteristics of the faults and finds that the high-frequency components of the transient zero-sequence currents of various lines have obvious differences. Accordingly, a voting line selection method based on waveform similarity of high-frequency components of transient zero sequence current is proposed. Combined with VMD algorithm and Bhattacharyya distance algorithm, the zero sequence current of each line is decomposed to obtain the transient high frequency components, and then the Bhattacharyya coefficients of the transient high frequency components among the lines are obtained. The fault line is voted by the method of preliminary voting and k-value test on the coefficient matrix. The simulation results under different fault conditions show that the method is simple and reliable, with high accuracy and credibility of line selection, wide applicability and certain anti-interference.

Key words: small current grounding system, single phase ground fault, transient zero sequence current, high frequency components, VMD, Bhattacharyya distance, waveform similarity, voting mechanis

CLC Number: 

  • TP277