标题：A Method of 20 kV Cable Line Fault Location Based on Sheath Grounding Current
作者：Guo, Faan; Zhu, Guofang; Dong, Xiaofeng
作者机构：[Guo, Faan; Zhu, Guofang] Shandong Univ, Sch Elect Engn, Jingshi Rd 17923, Jinan 250061, Shandong, Peoples R China.; [Dong, Xiaofeng] Suzhou Power S 更多
会议名称：51st Annual Meeting of the IEEE-Industry-Applications-Society (IAS)
会议日期：OCT 11-22, 2015
来源：2015 51ST IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING
关键词：Fault Location; Induced Circulating Current; Induced Voltage;; Overflowing Criterion; Sheath Grounding Current; Three-Core XLPE Power; Cable; Zero-Sequence Circuit
摘要：To solve the problem of fault location in 20 kV medium -voltage distribution network cable line, a method based on sheath grounding current is presented in this paper. When unsymmetrical earth fault occurs, the sheath grounding current contains three ingredients. After analyzing the relationship between induced circulating current flowing in cable sheath and zero -sequence current flowing in the cable core, it is found that the sheath grounding current has characteristics obvious enough to distinguish internal or external fault type. Based on this, sheath grounding current overflowing criterion is proposed which is effective to locate the fault section of cable line. At last, validity of the sheath grounding current overflowing criterion is verified by RTDS simulation results.