某变电站接地系统研究  

Study of Earthing System for Substation

作　　者：吴尚志 佟卫波 孟庆 WU Shangzhi;TONG Weibo;MENG Qing(Shanghai Electric Power Design Institute Co.,Ltd.,Shanghai 200025,China;State Grid Changchun Power Supply Company,Changchun 130051,China)

机构地区：[1]上海电力设计院有限公司,上海200025 [2]国网长春供电公司,长春130051

出　　处：《吉林电力》2020年第5期33-36,共4页Jilin Electric Power

摘　　要：针对目前国内接地设计按照均匀土壤电阻率计算结果与工程施工后的实际测量值存在较大误差的问题,采用接地计算软件CDEGS分析某变电站分层土壤模型,根据分层土壤电阻率计算接地电阻、接触电势和跨步电压。该分层土壤电阻模型更接近于工程实际,减少了建设工程二次返工的概率,提高了设计准确性。At present,homogeneous soil resistivity model is used to calculate the earthing design in China,the calculated results carried out in accordance with the uniform soil resistivity is different greatly with measurement value.This article uses the grounding calculation software CDEGS layered soil model analysis,according to the layered soil resistivity calculation of grounding resistance,step voltageand contact potential,layered soil resistance model is closer to the engineering practice,reduces the rate of the secondary rework for construction project,improves the design accuracy.

关 键 词：土壤电阻率 接地电阻 接触电势 跨步电压 

分 类 号：TM862.3[电气工程—高电压与绝缘技术]