Identification and Location of Single-Phase Line-Broken Fault of Arc-Suppression Coil Grounding System

doi:10.11930/j.issn.1004-9649.2017.08.113.05

Abstract

Abstract: In the 66 kV neutral point arc-suppression coil grounding system, single-phase line-broken fault occurs frequently on the overhead transmission lines, which leads to illusory grounding phenomenon, and it is hard to distinguish between single-phase line-broken fault and single-phase grounding fault by the traditional three-phase voltage characteristic method. In this paper, a theoretical analysis is made of the single-phase line-broken faults and the causes for illusory grounding phenomenon based on case studies of such faults. Based on a detail comparison of the single-phase grounding fault and the single-phase line-broken fault occurring in 10 kV busbars, a fault identification location method is proposed for system operators to identify the fault types and their locations.

Key words: arc-suppression-coil, single-phase wire break, single-phase grounding, method to discriminate, fault location

CLC Number:

TM773

JU Yong'an, LIU Cong, SHAN Rutao, TAN Wengang, WANG Fei, NI Chunlei. Identification and Location of Single-Phase Line-Broken Fault of Arc-Suppression Coil Grounding System[J]. Electric Power, 2017, 50(8): 113-117.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.08.113.05

https://www.electricpower.com.cn/EN/Y2017/V50/I8/113

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