小波变换在超高压输电线路双端故障测距中的应用  

Application of Wavelet Transformation in Double-end Fault Location in EHV Transmission Lines

作　　者：廖利荣[1] 董臣 俞凯 廖玄[1] 

机构地区：[1]三峡大学,湖北宜昌443002 [2]湖北超高压输变电公司,湖北宜昌443000 [3]宜昌电力勘测设计院,湖北宜昌443000

出　　处：《广东电力》2010年第11期10-13,共4页Guangdong Electric Power

摘　　要：研究了基于小波分解的故障测距,对故障行波电流信号进行相模变换,通过小波分解提取出故障分量发生奇异性的时间点,针对以往利用单端行波故障测距存在故障距离检测不准确的问题,采用双端故障测距将行波到达两端的时间相减,可以更准确地定位故障点。实例分析表明该方法有很高的测距精度。This paper makes a research of fault location based on the wavelet decomposition,analyzing the fault traveling-wave current signal by phase-mode transformation,and then extracting the time spot of singular signal of fault component by wavelet decomposition.In view of the inaccurate fault location by conventional single-terminal traveling-wave method,double-terminal method that subtracts the time of traveling wave＇s arrival at both ends enables more accurate fault location.The simulation results show that this method has great fault location accuracy.

关 键 词：行波 小波分解 波头检测 双端故障测距 

分 类 号：TM774[电气工程—电力系统及自动化]