鄂盛龙;文习山;蓝磊;王羽;安韵竹;戴敏;李志军;叶奇明;

• 1:武汉大学电气工程学院
• 2:中国电力科学研究院

摘要(Abstract)：

雷击是造成输电线路故障的主要原因之一,为研究平原和山区特高压输电线路遭受雷击的差异性,以1:12.5比例缩小的特高压SZ322型塔为研究对象,利用负极性80/2 500μs操作冲击电压.波,分别展开了平地和山区2种不同地形条件下的缩比线路雷击模拟放电试验,并结合空间静电场分布仿真计算对2种地形上放电路径分布的差异性进行定性分析。试验及仿真结果表明:平原和山区2种地形上放电路径选择性存在明显的差别,输电线路附近遭受雷击时,相对于平原上,斜山坡上输电线的电场强度更大,且下行先导头部的电场强度最大区域明显向输电线路侧偏移,因此山区的输电线更容易遭受雷击,大地的屏蔽效果差。当放电间隙尺寸增大时,结论依然成立,且2种地形上线路的绕击率差距增大,但两者的绕击率均下降,同时大地的屏蔽效果增强。研究结果对特高压输电线路雷电防护工作具有一定的参考意义。

关键词(KeyWords)： 特高压;雷击特性;模拟试验;地形;放电路径;静电场计算

Abstract:

Keywords:

基金项目(Foundation): 中国博士后科学基金项目(2014M560624)~~

作者(Author): 鄂盛龙;文习山;蓝磊;王羽;安韵竹;戴敏;李志军;叶奇明;

Email:

DOI: 10.13335/j.1000-3673.pst.2015.01.018

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