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

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    基于小波分析法的行波故障測距方法研究

    來源:電工電氣發布時間:2021-02-22 14:22 瀏覽次數:803

    基于小波分析法的行波故障測距方法研究

    徐高,瞿峰,周強
    (國網江蘇省電力有限公司檢修分公司,江蘇 南京 210003)
     
        摘 要:超高壓輸電線路發生故障瞬間,故障電磁波將由故障點向兩側線路傳播,通過捕獲線路兩側行波波頭到達的初始時間,即可以求解得到故障點位置。闡述了基于小波分析法的行波故障測距方法原理,基于EMTP仿真軟件搭建雙端輸電線路模型,采用小波分析工具辨識故障行波,對不同故障距離、過渡電阻值情況進行仿真分析。結果表明,基于小波分析法的行波故障測距方法故障定位精度高、穩定性好,基本不受故障類型、故障距離變化等因素影響,魯棒性極強。
        關鍵詞:行波;小波分析;EMTP仿真軟件;魯棒性
        中圖分類號:TM723     文獻標識碼:A     文章編號: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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