分层土壤模型下大型接地网冲击特性研究  

Impact Characteristics of Large Grounding Grid under Layered Soil Model

作　　者：王森 李伟 李柯 刘刚 杨楠 盛冰燕 马维良 WANG Sen;LI Wei;LI Ke;LIU Gang;YANG Nan;SHENG Bingyan;MA Weiliang(Shaanxi Electric Power Research Institute of State Grid,Xi’an 710100,China;Lantian County Power Supply Branch of State Grid Shaanxi Electric Power Company,Xi'an 710500,China;Transformation Maintenance Room of State Grid Weinan Power Supply Company,Weinan 714000,China;Shaanxi Fenghua Power Technology Co.,Ltd.,Xi'an 710000,China)

机构地区：[1]国网陕西省电力公司电力科学研究院,西安710100 [2]国网陕西省电力公司蓝田县供电分公司,西安710500 [3]国网渭南供电公司变电检修室,陕西渭南714000 [4]陕西锋华电力科技有限公司,西安710000

出　　处：《电瓷避雷器》2021年第4期30-34,共5页Insulators and Surge Arresters

基　　金：国家重点研发计划(编号:2018YFC0809400)。

摘　　要：为了分析分层土壤模型下大型接地网的冲击特性参数分布规律,包括暂态地电位升、接触电压和跨步电压等,结合在陕西渭南市某地测量土壤电阻率试验的基础上,通过CDEGS软件建立了分层土壤模型下的大型接地网常规设计模型,并针对模型进行了30 kA雷电流冲击特性仿真,得到了大型接地网在雷电流入侵时的地电位升分布,并针对常规接地网的设计提出了两种不同的优化方案,以尽可能降低雷电流流入接地网时的地电位升,使地电位升分布均匀,比较得出一种优选方案,可作为大型接地网工程设计的参考建议,具有一定的工程实用价值。In order to analyze the impact characteristic parameters distribution of the large-scale grounding grid under layered soil model,including the transient ground potential rise,contact voltage and step voltage,the design model of the large-scale grounding grid under layered soil model is established through the CDEGS software,based on the soil resistivity measurement test in Weinan city,Shaanxi province.Simulation of 30 kA lightning current impact characteristics is carried out.In order to reduce the ground potential rise when the lightning current flows into the grounding grid and make the distribution of ground potential rise uniform,an optimal design is proposed,which can be used as a reference for the engineering design of large grounding grid.

关 键 词：大型接地网 分层土壤 冲击特性 优化设计 

分 类 号：TM862[电气工程—高电压与绝缘技术]