基于小波变换的同杆并架双回线双端行波故障测距  

WAVELET TRANSFORM BASED DOUBLE TERMINAL METHOD OF TRAVELLING WAVE FAULT LOCATION IN DOUBLE-CIRCUIT PARALLEL TRANSMISSION LINE

作　　者：覃剑[1] 黄震[2] 邱宇峰[1] 卫小凡[2] 

机构地区：[1]中国电力科学研究院,北京市100085 [2]四川省电力公司调度中心,四川省成都市610016

出　　处：《电力系统自动化》2004年第5期51-55,共5页Automation of Electric Power Systems

基　　金：原国家电力公司重大科技项目资助项目(SP11-2001-01-03)。

摘　　要：利用小波变换的双端行波测距新方法,可有效提取同杆并架双回线路故障行波特征并消除行波色散对定位精度的影响,同时解决了如何定义行波到达时间和选取行波传播速度的问题。大量仿真测距结果证实论文方法的测距精度基本不受线路长度、故障位置、故障类型、接地电阻大小等的影响,测距精度能在一个挡距内,满足精确故障定位的要求。A new double terminal method of travelling wave fault location using wavelet transform for double-circuit parallel transmission line is presented. It can effectively extract the characteristics of travelling waves and eliminate the effects of the travelling wave dispersion on the fault location accuracy. In addition, it makes the definition of arrival time and the choice of propagation velocity more reasonable. A large amount of simulation results show that the new method is accurate and reliable. The accuracy of the method is not affected by line length, fault positions, fault types, grounding resistance, and it can meet the requirements of advanced fault location.

关 键 词：故障测距 小波变换 行波 同杆并架双回线路 

分 类 号：TM755[电气工程—电力系统及自动化]