【摘要】 首先介绍了带外串联间隙避雷器(EGLA)的结构及其工作原理。应用电磁暂态计算程序ATP-EMTP建立了典型10 kV配电线路的耐雷水平仿真计算模型,对线路直击雷、感应雷耐雷水平以及安装EGLA的改善效果进行分析计算。比较了EGLA不同配置方案下,线路雷击导线、雷击杆塔以及雷击附近物体引起的感应雷耐雷水平的差异;分析了雷击时EGLA串联间隙、避雷器本体(SVU)以及绝缘子之间配合的电压特征;并对EGLA防雷效果的影响因素进行分析。计算结果表明,提高EGLA配置数量﹑减小杆塔冲击接地电阻可有效提高EGLA在配网线路中的防雷效果。更多还原

【Abstract】 The structure of arrester with series gap and its working principle are introduced. Based on electromagnetic transient simulation program( ATP-EMTP),the 10 kV overhead line model is established,which can analyze and calculate the line lightning withstand level and the improvement that arrester with series gap caused. With different arrester configurations,the lightning withstand levels about lightning induced,lightning stroke conductor and lightning stroke tower are compared. The characteristics of the voltage on EGLA are analyzed. The influence factors of EGLA lightning protection are also described. The simulation results show that increasing the density of arresters with series gap or reducing the impulse grounding resistance can effectively improve the lightning withstand level of 10 kV transmission line.更多还原