220kV棉紫线线路避雷器安装方案研究

线路避雷器是降低线路雷击跳闸率和事故率的有效手段,但由于全线装设投资的成本较大,故提出以雷击跳闸情况、雷电参数统计分析、地形地貌分析、防雷计算分析为思路的综合防雷性能评估,同时给出了线路避雷器的安装策略;曾经发生雷击跳闸的杆塔；反击风险评估等级为D级的杆塔;反击风险评估等级为C级且塔高大于50m的杆塔；绕击风险评估等级...

Installation Scheme Study on Line Arrester of 220 kV Mianzi Line

Line arrester is an effective method to reduce the lightning trip-out rate and accidents rate,but because of its large cost for full line installation,the comprehensive lightning protection performance evaluation by lightning trip-out situation,lightning parameters and statistical analysis,landform analysis,lightning protection calculation and analysis is proposed,and installation strategy of line arrester is given:the tower had been struck by lightning;the tower that the counterattack risk assessment rating is class D,the tower that the counterattack risk assessment rating is class C and higher than 50 m;the tower that the strike risk assessment rating is class D;the tower that the strike risk assessment rating is class C and the span distance is more than 800 m;the tower that needed to prevent high potential transfer of lightning combined with the terrain analysis;the tower that local strong convective weather more easily affect to.