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电网技术  2006 

避雷器改善35kV配电线路耐雷水平的效果分析

, PP. 91-95

Keywords: 线路避雷器,耐雷水平,冲击接地电阻,避雷线,35kV配电线路,高电压与绝缘技术

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Abstract:

应用电磁暂态计算程序(electromagnetictransientprogram,EMTP)对安装金属氧化物避雷器的35kV配电线路的耐雷水平进行了分析计算。具体比较了雷击有、无避雷线的线路,采取不同避雷器安装方案时的耐雷水平;分析了杆塔冲击接地电阻、绕击导线位置对耐雷水平的影响。仿真计算结果表明,安装线路避雷器﹑减小杆塔的接地电阻可有效提高35kV配电线路的耐雷水平。对于35kV有避雷线配电线路,加装线路避雷器后可显著降低其发生绕击闪络的概率。

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