S注入法选线局限性研究

华电技术 ›› 2012, Vol. 34 ›› Issue (11): 10-15.

S注入法选线局限性研究

李俊，丁凡，王科，王纪斌，徐云龙

许继电气股份有限公司，河南许昌461000

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-11-25 发布日期:2012-11-25

Study on limitation of signal injection method for fault line selection

LI Jun, DING Fan, WANG Ke, WANG Jibin, XU Yunlong

XJ Electric Company Limited, Xuchang 461000, China

Received:1900-01-01 Revised:1900-01-01 Online:2012-11-25 Published:2012-11-25

摘要/Abstract

摘要： S注入法是小电流接地选线及定位的常用方法，在被广泛使用的同时其局限性也日益突出。在总结了前人的成熟理论和经验后的基础上，利用注入法对10kV配电网单相接地故障进行了研究，在全面考虑过渡电阻、线路长度对选线以及线路长度对定位效果的影响后，用PSCAD仿真得出了利用S注入法选线的不利条件以及定位的有效长度。

关键词: 小电流接地选线, 故障定位, S注入法, 过渡电阻, 线路长度

Abstract: The signal injection method is a common method for small current grounding fault line selection and fault location, and along with its wide application, its limitation appears obviously day by day. Based on the summary of the maturational theory and experience of predecessors, using the S injection method, the single phase grounding fault of 10kV distribution network was researched. Considering the influence of the transition resistance and the line length on line selection and the influence of the line length on the fault location effect comprehensively, using the PSCAD simulation, the disadvantages of S injection method for line selection and the effective length of the fault location were obtained.

Key words: small current grounding fault line selection, fault location, signal injection method (S injection method), transition resistance, line length

李俊;丁凡;王科;王纪斌;徐云龙. S注入法选线局限性研究[J]. 华电技术, 2012, 34(11): 10-15.

LI Jun;DING Fan;WANG Ke;WANG Jibin;XU Yunlong. Study on limitation of signal injection method for fault line selection[J]. Huadian Technology, 2012, 34(11): 10-15.

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