单相并联间隙在10kV双回架空线路中的应用方式

Application of single-phase parallel clearance in 1okV double circuit overhead lines

10kV架空线路雷击跳闸率高,而适用的防雷措施较少。采用单相并联间隙的方法,可有效提升10kV架空配电线路的耐雷水平。但对于双回架空线路,单相并联间隙仍有多种组合,需要选择最优化的应用方式。文章利用ATP-EMTP软件建立相关仿真计算模型,分析不同单相并联间隙的组合方式的防雷效果。结果表明,线路遭受感应雷过电压时,建议在每回线路的最高相上均安装一只并联间隙;线路遭受直击雷过电压时,仅在第一回线路的最高相安装一相并联间隙,具有最佳的防雷效果。所得结果可为10kV双回架空线路防雷方法的综合应用提供参考。

10kV overhead power lines have a high lightning trip rate,and there are few applicable lightning protection measures.The method of using single-phase parallel clearance can effectively improve the lightning resistance level of 10kV overhead distribution lines.However,for double circuit overhead lines,there are still various combinations of single-phase parallel clearances,and the optimal application method needs to be chosen.This article uses ATP-EMTP software to establish relevant simulation calculation models and analyze the lightning protection effects of diferent combinations of single-phase parallel gaps.The results indicate that when the line is subjected to induced lightning overvoltage,it is recommended to install a parallel gap on the highest phase of each circuit;When the line is subjected to direct lightning overvoltage,only one phase parallel gap is installed at the highest phase of the first circuit line,which has the best lightning protection effect.The obtained results provide a reference for the comprehensive application of lightning protection methods for 10kV double circuit overhead lines.