Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于小波分析法的行波故障测距方法研究

来源:电工电气发布时间:2021-02-22 14:22 浏览次数:747

基于小波分析法的行波故障测距方法研究

徐高,瞿峰,周强
(国网江苏省电力有限公司检修分公司,江苏 南京 210003)
 
    摘 要:超高压输电线路发生故障瞬间,故障电磁波将由故障点向两侧线路传播,通过捕获线路两侧行波波头到达的初始时间,即可以求解得到故障点位置。阐述了基于小波分析法的行波故障测距方法原理,基于EMTP仿真软件搭建双端输电线路模型,采用小波分析工具辨识故障行波,对不同故障距离、过渡电阻值情况进行仿真分析。结果表明,基于小波分析法的行波故障测距方法故障定位精度高、稳定性好,基本不受故障类型、故障距离变化等因素影响,鲁棒性极强。
    关键词:行波;小波分析;EMTP仿真软件;鲁棒性
    中图分类号:TM723     文献标识码:A     文章编号:1007-3175(2021)02-0049-04
 
Research on Traveling Wave Fault Location
Method Based on Wavelet Analysis
 
XU Gao, QU Feng, ZHOU Qiang
(State Grid Jiangsu Electric Power Co., Ltd Maintenance Branch Company, Nanjing 210003, China)
 
    Abstract: At the moment of UHV transmission line fault, the fault electromagnetic wave will propagate from the fault point to the lines on both sides. By capturing the initial arrival time of the traveling wave heads on both sides of the line, the fault location can be obtained. This paper describes the principle of traveling wave fault location method based on wavelet analysis, and builds a two terminal transmission line model based on EMTP simulation software, it uses wavelet analysis tool to identify fault traveling wave, and carries out simulation analysis on different fault distance and transition resistance value. The results show that the traveling wave fault location method based on wavelet analysis has high fault location accuracy and good stability, and is basically not affected by factors such as fault type and fault distance change, and is extremely robust.
    Key words: traveling wave; wavelet analysis; EMTP simulation software; robustness
 
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