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基于测距函数相位特性的T型高压线路故障定位原理
引用本文:林富洪,王增平,曾惠敏.基于测距函数相位特性的T型高压线路故障定位原理[J].中国电机工程学报,2011,31(13).
作者姓名:林富洪  王增平  曾惠敏
作者单位:电力系统保护与动态安全监控教育部重点实验室(华北电力大学),北京市,昌平区,102206
基金项目:国家自然科学基金项目(50837002)~~
摘    要:针对现有T型高压线路故障测距方法在T节点附近高阻短路故障时有测距死区这一不足,提出一种适用于T型高压线路的故障快速定位法.通过分析可知,在故障支路故障点前后测距函数的相位会发生一次突变,在正常支路上测距函数的相位不会发生突变,因此可根据故障支路上测距函数的相位突变点即为故障点这一特征进行故障定位.该方法将故障支路判别和故障测距融为一体,无需事先判别故障支路即可测距.该方法无测距死区,较好地克服了传统方法在T节点附近有死区的不足.该方法对电弧故障具有良好的适用性.PSCAD/EMTDC仿真结果表明,该方法基本上不受过渡电阻、故障类型、故障位置和负荷电流等因素的影响,在各支路参数偏离设计值时依然能正确识别故障支路,保持较高的测距精度.

关 键 词:电力系统  T型线路  故障测距  相位特性  测距死区

A Novel Fault Location Algorithm Based on Phase Characteristics of Fault Location Function for Three-terminal Transmission Lines
LIN Fuhong , WANG Zengping , ZENG Huimin.A Novel Fault Location Algorithm Based on Phase Characteristics of Fault Location Function for Three-terminal Transmission Lines[J].Proceedings of the CSEE,2011,31(13).
Authors:LIN Fuhong  WANG Zengping  ZENG Huimin
Institution:LIN Fuhong,WANG Zengping,ZENG Huimin(Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control(North China Electric Power University),Ministry of Education,Changping District,Beijing 102206,China)
Abstract:While the high resistance fault occurs near the teed node,the current fault location methods used for teed lines can't identify the fault section correctly,thus fail to locate the fault.To overcome the defect,a new fault location algorithm based on the phase characteristics of fault location function is proposed.The fault location function is established on the basis of the concept that selects a reference point to match the fault.It is concluded that,the phase characteristics of the function in the fault b...
Keywords:power system  teed lines  fault location  phase characteristic  dead zone of fault location  
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