“S注入法”接地选线原理分析与改进

山东大学学报(工学版)

“S注入法”接地选线原理分析与改进

刘英亮¹，龚俊祥²，魏国栋³，孟令军⁴，张洁²

1. 山东大学电气工程学院，山东济南250061；2. 威海供电公司，山东威海264200；3. 华电淄博热电有限公司，山东淄博255000；4. 山东山大电力技术有限公司，山东济南250061

收稿日期:2007-01-04 修回日期:1900-01-01 出版日期:2007-08-24 发布日期:2007-08-24
通讯作者: 刘英亮

Analysis and improvement of the‘S injection’fault feeder detection method

LIU Ying-liang¹，GONG Jun-xiang²，WEI Guo-dong³，MENG Ling-jun⁴，ZHANG Jie²

1. School of Electrical Engineering，Shandong University；2. Weihai Electric Power Company；3. Huadian Zibo Thermoelectric Power Co.,Ltd.；4. Shandong University Electric Power Tecchnology Co.,Ltd.

Received:2007-01-04 Revised:1900-01-01 Online:2007-08-24 Published:2007-08-24
Contact: LIU Ying-liang

摘要/Abstract

摘要： 介绍了电力系统中小电流接地系统发生单选接地故障时的系统参数的变化特征，对现有小电流接地选线装置应用的选线原理和方法进行比较、分析，并就基于“S注入”法原理的小电流接地选线方法进行探讨，提出了采用突变量比幅、信号相位检测和双频注入三种方法来提高选线准确性.

关键词: 小电流接地, “S注入法”, 单相接地故障, 选线

Abstract: The characteristics of system parameters were given when a single-phase-to-ground fault occurs in a neural ineffectively grounded system, and the principles and methods of present fault feeder detection devices were analyzed. The fault feeder detection method was investigated based on the ‘S injection' principle, and three methods were proposed to improve the accuracy of fault feeder detection, i.e., magnitude comparison of burst current, signal phase detection and double frequencies injection.

Key words: neural ineffectively ground, S injection, single-phase-to-ground fault, feeder detection

中图分类号:

TM771

刘英亮,龚俊祥,魏国栋,孟令军,张洁 . “S注入法”接地选线原理分析与改进[J]. 山东大学学报(工学版), 2007, 37(4): 64-67 .

LIU Ying-liang,GONG Jun-xiang,WEI Guo-dong,MENG Ling-jun,ZHANG Jie .

Analysis and improvement of the‘S injection’fault feeder detection method

[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(4): 64-67 .

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