基于小波分析的多尺度下综合行波故障定位  

Fault Location Based on Comprehensive Wavelet Analysis at different Scales

作　　者：余畅 尹项根[1] 曾祥君[1] 陈德树[1] 邹建明[2] 

机构地区：[1]华中科技大学电力系,湖北武汉430074 [2]华中电力集团公司,湖北武汉430074

出　　处：《电力自动化设备》2001年第6期6-9,共4页Electric Power Automation Equipment

摘　　要：正确识别和检测线路故障后的行波信号是实现行波故障测距的关键。由于小波变换具有在时域和频域表征信号局部特性等性质 ,它适合检测故障行波这样的突变信号。通过分析三次B样条小波的特征 ,提出了综合考虑在不同尺度下小波分析结果 ,从而实现精确故障定位的方法。将该算法应用于新型故障测距装置中 ,其定位精度 <± 40 0m。Correct identification and detection of fault traveling wave essential to fault location. Wavelet transform is appropriate for transient signal detection of fault traveling wave because of its local characteristics in both time and frequency domains. An accurate fault location method is presented, which analyzes the characteristics of 3 order B spline wavelet and comprehensively considers the wavelet analysis results at different scales. It is applied in a new type of fault locator,and the location error is within 400 meters.

关 键 词：输电线路 小波分析 行波 故障定位 电力系统 

分 类 号：TM726[电气工程—电力系统及自动化] TM711