基于区段零序导纳的小电流接地故障定位方法  

Fault Location Method Based on Zero-sequence Admittance of Sections in Non-effectively Grounded System

作　　者：张林利[1] 高厚磊[1] 徐丙垠[2] 薛永端[3] 

机构地区：[1]山东大学电气工程学院,山东省济南市250061 [2]山东理工大学电气与电子工程学院,山东省淄博市255049 [3]中国石油大学(华东)信息与控制工程学院,山东省东营市257061

出　　处：《电力系统自动化》2012年第20期94-98,共5页Automation of Electric Power Systems

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA050213);国家自然科学基金资助项目(51077090;51177096)~~

摘　　要：提出一种基于馈线区段零序导纳的小电流接地故障定位新方法。分段开关将配电网各馈线分成若干区段,在分析健全区段与故障区段零序导纳特征的基础上,讨论了基于零序导纳的故障区段判据。该定位方法可利用馈线终端单元作为现场测量装置,借助配电自动化系统实现。数字仿真结果证明:该方法定位准确率高,不易受系统运行方式、线路参数和过渡电阻等因素影响,能满足现场实用要求。A novel location method for single phase-to-earth fault based on zero-sequence admittance of feeder section in non-effectively grounded system is presented.Each feeder of the distribution network is divided into several sections by the sectionalized switches.The criterion for faulty section based on zero-sequence admittance is discussed on the basis of analyzing zero-sequence admittance characteristics of sound section and faulty section.By using the feeder terminal unit（FTU） as field measurement equipment,this method for fault location can be implemented in distribution automation（DA） system.The results of digital simulation demonstrate that this method is immune to the variation of system operation mode,feeder parameter and transition resistance etc.,it has a high location accuracy and can meets the practical requirements.

关 键 词：故障定位 小电流接地 区段零序导纳 馈线终端单元 

分 类 号：TM862[电气工程—高电压与绝缘技术]