基于三端法的HHT行波故障测距研究  

HHT traveling wave fault location method based on the study of the three end method

作　　者：艾颖梅 陈剑云[1] 何军娜 冯秋实[1] 林鹏[1] 黄玉萍[1] 

机构地区：[1]华东交通大学电气与电子工程学院,南昌330013

出　　处：《电测与仪表》2015年第21期11-16,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51467004)

摘　　要：输电线行波故障定位的技术关键在于提高捕捉故障行波波头信号到达时间的精确度以及行波波速度的确定。小波变换(Wavelet Transform,WT)是目前主要采用的波头识别算法,而希尔伯特-黄变换(HilbertHuang Transform,HHT)作为分析非平稳和非线性信号一种强大的工具值得深入研究,文章提出了基于三端测距法的HHT行波测距方法。采用Simulink建立输电线路仿真模型,通过haar、db4小波和HHT分析对比,结果表明HHT能更有效地提高故障定位精度,且克服了小波变换需要选择小波基函数和分解尺度的缺点。The key technology of the traveling wave fault location of transmission line is to capture the accuracy of fault traveling wave signal arrival time and the determination of the traveling wave velocity. The wavelet transform （Wavelet Transform, WT） is currently adopted by the main wave head identification algorithm, and the Hilbert- Huang Transform （Hilbert-Huang Transform, HHT） as a new and powerful analysis tool is worth further researching, which is used for the analysis of non-stationary and nonlinear signal. Based on the theory of three-ended traveling wave fault location, the transmission line simulation model of the simulink is established in the paper, by means of Haar, db4 wavelet and HHT analysis, the results show that HHT can effectively improve the precision of fault location, and overcome the shortcomings that the wavelet transform need to choose the wavelet function and the decomposition scales.

关 键 词：输电线路 故障定位 行波 三端法 小波变换 HILBERT-HUANG变换 

分 类 号：TM726[电气工程—电力系统及自动化]