雷擊造成的線路短路點(diǎn)識別和定位方法
韓志錕
江蘇省電力設(shè)計(jì)院，江蘇 南京 211102
摘 要： 雷擊造成線路故障后，故障點(diǎn)的及時識別和定位有利于電力系統(tǒng)穩(wěn)定運(yùn)行。對故障性雷擊進(jìn)行仿真，根據(jù)故障行波的特點(diǎn)提出判斷故障點(diǎn)與雷擊點(diǎn)位置異同的方法。并提出利用相關(guān)分析法處理故障行波，根據(jù)相關(guān)法的定義得到相關(guān)峰含義，推導(dǎo)得出測距公式，利用測距公式，對仿真模型進(jìn)行故障測距。測距結(jié)果驗(yàn)證表明，該方法對近距離復(fù)雜波頭的識別準(zhǔn)確有效，可有效進(jìn)行故障性雷擊的故障測距。
關(guān)鍵詞： 雷擊；輸電線路；故障測距；相關(guān)分析法；相關(guān)峰
中圖分類號：TM855 文獻(xiàn)標(biāo)識碼：A 文章編號：1007-3175(2013)11-0010-05
Identifying and Positioning of Line Short Circuit PointCaused by Lightning Stroke
HAN Zhi-kun
Jiangsu Electric Power Design Institute, Nanjing 211102, China
Abstract: After line fault caused by lightning stroke, in-time identifying and positioning of fault point is favorable for stable operation of power system. This paper carried out simulation for fault lightning stroke point. According to the features of fault waves, a method to judge the difference between fault point and lightning stroke point was raised and the correlation analysis method was proposed to deal with fault travelling wave. According to the definition of correlation, the correlation peak definition was obtained, thus to derive distance measuring formula. The formula was used to carry fault distance measurement for simulation model. The result of distance measurement shows that the method is correct and valid for the identification of short distance complicated peak wave head identification, can effectively carry out fault distance measurement of lightning stroke.
Key words: lightning stroke; transmission line; fault distance measurement; correlation analysis; correlation peak
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