运用ATP-EMTP研究地电位干扰防护措施效果  

The Study of the Effects on Protection Measures of Potential Interference Based on ATP-EMTP

作　　者：罗勋[1] 吴广宁[1] 曹晓斌[1] 吴昊[1] 黄渤[1] 张先怡[1] 龚宏奎[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《电瓷避雷器》2013年第6期71-75,共5页Insulators and Surge Arresters

基　　金：国家电网公司科技项目(编号:2011-WG-4);铁道部重大专项课题(编号:2011T008)

摘　　要：针对变电所遭受雷击时接地网中地电位分布不均的问题,运用ATP-EMTP软件仿真分析地网上雷电暂态电位分布情况。根据实际接地网搭建的接地体的数学模型,增加垂直接地体对于接地网的设计和铺设上能解决地电位均衡问题,改善冲击电位分布,改善工频大电流入地时的地电位分布,防止局部电位升高。通过改变土壤电阻率和接地网孔大小,分析地电位的变化规律,总结两种防护措施的情况,为改进地电位防护措施提供一定参考。Focus on the uneven potential distribution problems of ground grid when the transformer substation is struck by lightning, the conditions of lightning transient potential distribution on the grid is simulated and analyzed by the ATP-EMTP software. The mathematical model of grounding body is established based on actual grounding grid structures, Adding grounding body can solve the problem of ground potential uniform for the design and laying of grounding grid, improve the impact potential distribution, improve the ground potential distribution when the power frequency flow into the ground, and prevent the rise of the local potential. Through changing the soil resistivity and size of ground grid, and analysis of the ground potential change rule, summarizing the two kinds of protective measures, consequently the certain reference is provided for improving the protective measures of grounding potential.

关 键 词：接地网 暂态电位分布 ATP—EMTP 电阻率 网格大小 

分 类 号：TM862[电气工程—高电压与绝缘技术]