基于年久变电站负容量变大接地网的优化  

Grounding Network Optimization for Old Substation With Increased Load Capacity

作　　者：扈海泽 敬亮兵[2] 赵军[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410000 [2]国网湖南省电力公司娄底供电局,湖南娄底417000

出　　处：《电力与能源》2015年第5期681-684,共4页Power & Energy

摘　　要：对变电站负荷容量变大,导致入地电流变大,原来接地网又无法重新铺设以至于接地阻抗达不到要求而对接地网进行优化设计分析,采用主地网边缘添加垂直接地体和外接辅助圆形接地网,来降低接地阻抗,并用ATP-EMTP进行仿真对比,使变电站的接地电阻降低,达到负荷容量变大后允许的最大接地电阻的范围内,从而使接地网满足变电站负荷容量变大的情况。The grounding network needs optimal design when the increased substation load capacity leads to the increased grounding current,while the original grounding network can not be rerouted so that the grounding impedance can not meet the requirements.The impedance can be reduced by installing vertical grounding electrode at the edge of the main grounding network and connecting an external auxiliary circular grounding network.Then through ATP-EMTP simulation comparison,the grounding resistance can approximate the maximum limit,so that the grounding impedance can meet the requirements of the enlarged load capacity.

关 键 词：变电站 接地阻抗 垂直接地体 圆形接地网 

分 类 号：TM862[电气工程—高电压与绝缘技术]