雷击临近建筑物土壤散流引发配电线路雷电过电压及防护  

Lightning Over-Voltage and Protection of Distribution Lines Caused by Lightning Striking Soil Dissipation near Buildings

作　　者：冯守信 毛惠卿 胡元潮[1] 穆明亮 吴晓东 夏瑞瑞 FENG Shouxin;MAO Huiqing;HU Yuanchao;MU Mingliang;WU Xiaodong;XIA Ruirui(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China;Binzhou Power Supply Company,State Grid Shandong Electric Power Company,Binzhou 256600,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]国网山东省电力公司滨州供电公司,山东滨州2566000

出　　处：《电瓷避雷器》2023年第1期99-105,156,共8页Insulators and Surge Arresters

基　　金：山东省自然科学基金(编号:ZR2021ME092);国家自然科学基金(编号:51807113)。

摘　　要：为研究雷击配电线路附近建筑物时,土壤散流引发配电线路雷电过电压及防护效果,采用专业防雷计算软件CDEGS建立建筑接地网及临近配电线路雷电过电压仿真模型,分析了配电线路与临近建筑接地网间距、土壤电阻率、雷电流幅值和配电线路接地网长度对配电线路上雷电过电压的影响,并仿真验证了引流法和绝缘间隔法的防护效果。研究结果表明:配电线路电位随间距的增大而减小,随土壤电阻率和雷电流幅值的增大而线性增大,受配电线路接地网长度影响不大;引流法和绝缘间隔法能有效地降低配电线路接地体上电位,水平外延法引流降压效果更好,可以将配电线路接地体上电位降到56 kV以下,有效地避免雷电反击事故发生的概率。本研究可为实际配电线路雷电过电压和防护提供参考。In order to study the lightning overvoltage and protection effect of distribution lines triggered by soil dissipation when lightning strikes buildings near distribution lines,the professional lightning protection calculation software CDEGS is used to establish a simulation model of building grounding network and adjacent distribution lines for lightning overvoltage,and analyze the influence of distribution lines and adjacent building grounding network spacing,soil resistivity,lightning current amplitude and distribution line grounding network length on the distribution lines for lightning overvoltage.And the simulation verifies the protection effect of the diversion method and the insulation spacing method.The research results show that:the distribution line potential decreases with the increase of spacing,increases linearly with the increase of soil resistivity and lightning current amplitude,and is not greatly affected by the length of the distribution line grounding network;The diversion method and insulation spacing method can effectively reduce the distribution line potential,and the horizontal extrapolation method has a better effect of diversion and voltage reduction,which can reduce the distribution line potential to below 56 kV and effectively avoid the probability of lightning backlash accidents.The research can provide reference for the lightning overvoltage and protection of distribution lines.

关 键 词：雷击建筑物 土壤散流 雷电过电压 过电压防护 

分 类 号：TM86[电气工程—高电压与绝缘技术]