基于CDEGS的多电流极法测量变电站接地电阻研究  

Research on Measurement of the Substation Grounding Resistance by Multi-Current Electrodes Based on CDEGS

作　　者：秦天 刘浔[2] 涂春华[1] 吴国华[1] QIN Tian;LIU Xun;TU Chunhua;WU Guohua(State Grid Wuhan Power Supply Company,Wuhan 430000,China;College of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网武汉供电公司,武汉430000 [2]华中科技大学电气与电子工程学院,武汉430074

出　　处：《电瓷避雷器》2020年第6期136-143,共8页Insulators and Surge Arresters

摘　　要：基于CDEGS仿真计算发现,采用多电流极法测量大型接地网接地电阻时,可以通过增加环绕接地网均匀布置的电流极数量方式缩短电流极与接地网之间距离,便于工程实际应用。探讨了一种工程实际中易于实现的多电流极测量方法。将多个电流极沿直线布设在接地网附近,根据CDEGS计算,五电流极沿直线布设的测量系统中均匀电流场效果最明显,当电压补偿点位置为0.8倍地网中心与直线布置的中心电流极之间的距离时,仿真计算出的测量误差不大于5%。Based on CDEGS simulation and calculation,it is found that when measuring the grounding resistance of large grounding grid by multi-current electrodes method,the distance between the current electrodes and the grounding grid can be shortened by increasing the number of current electrodes arranged around the grounding grid,which is convenient for practical application of engineering. The multi-current electrodes measurement method which is easy to implement in engineering practice is discussed.When five current electrodes are arranged along a straight line near the grounding grid,according to the CDEGS calculation,the effect of uniform current field distribution is most obvious. When the voltage compensation point is located at a distance of 0. 8 times the distance between the center of the ground and the central current electrodes of the straight line arrangement,the measuring error calculated by the CDEGS simulation is not more than 5%.

关 键 词：CDEGS 接地电阻 多极法 电位补偿点 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM63