城区配电线路感应雷过电压的防护措施研究  

Study on Protection Measures Against Induced Lightning Overvoltage of Distribution Line in Urban Area

作　　者：王毅 申佃涛 苏荻 程梓航 王曦 安韵竹 WANG Yi;SHEN Diantao;SU Di;CHENG Zihang;WANG Xi;AN Yunzhu(State Grid Shandong Power Supply Company,Zibo Power Supply Company,Zibo 255000,China)

机构地区：[1]国网山东省电力公司淄博供电公司,山东淄博255000

出　　处：《电工技术》2021年第23期135-139,143,共6页Electric Engineering

摘　　要：以城区10 kV配电线路为研究对象,建立雷电回击过程中配电线路感应雷过电压的数值计算模型,对配电线路感应雷过电压分布特性进行仿真计算,分析了并联保护间隙和避雷器对配电线路感应雷过电压的限制效果,并对比了5种不同安装密度下并联保护间隙和避雷器的感应雷过电压限制效果。仿真计算结果表明,采用并联保护间隙和避雷器均能降低10 kV配电线路的感应雷过电压;距离落雷位置最近的杆塔上装设保护间隙或避雷器,可有效降低配电线路上的感应雷过电压幅值;距离落雷位置最近的杆塔上未装设保护间隙或避雷器,配电线路感应雷过电压的降低效果不明显。Taking 10 kV distribution lines in urban areas as the research object,a numerical calculation model for the induced lightning overvoltage of distribution lines during lightning return strikes is established.The distribution characteristics of induced lightning overvoltage of distribution lines are simulated,the limiting effects of parallel protection gap and arrester on induced lightning overvoltage of distribution lines are analyzed,and the limiting effects of parallel protection gap and arrester under five different installation densities are compared.The simulation calculation results show that the use of parallel gaps and arresters can reduce the induced lightning overvoltage of 10 kV distribution lines.A protective gap or lightning arrester is installed on the tower closest to the lightning location,which can effectively reduce the amplitude of induced lightning overvoltage on the distribution line.There is no protective gap or lightning arrester installed on the pole tower closest to the lightning location,and the effect of reducing the induced lightning overvoltage of the distribution line is not obvious.

关 键 词：配电线路 感应雷过电压 保护间隙 避雷器 安装密度 

分 类 号：TM862[电气工程—高电压与绝缘技术]