A new approach of fault line detection in small current grounding system

被引：0
|
作者：
Li, Bo [1 ]
机构：
[1] Electronics and Information Engineering College, Liaoning University of Technology, No. 169, Shiying Street, Guta District, Jinzhou 121001, China
来源：
ICIC Express Letters | 2014年 / 8卷 / 06期
关键词：
Frequency domain analysis - Fault detection - Time domain analysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
To improve accuracy of the existing fault line detection (FLD) method and seek a universal detection approach for both neutral non-grounding system (NUS) and neutral grounding system via arc-suppression coil (NES), we discuss a new approach applying Dempster-Shafer (D-S) evidence theory in this paper. First, the mechanism of single-phase-to-ground (SPTG) fault is presented. For small current grounding system (SCGS), the mathematical analysis on zero-sequence current is implemented. Afterwards, the criterion on magnitude-comparison of zero-sequence current in frequency domain and the criterion on amplitude-comparison of the fifth harmonic in time domain are proposed. Further, a multi-criterion FLD approach integrated D-S evidence theory is advanced. The simulation results confirm the reliability of our proposed approach. © 2014 ISSN 1881-803X.
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页码：1703 / 1709
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