考虑土壤电离的垂直接地极冲击散流性能分析  

Analysis of Vertical Grounding Electrodes Impulse Dispersing Characteristics Considering Transient Ionization Phenomenon of Soil

作　　者：李景丽[1] 李渊博[1] 武东亚[2] 王磊磊[1] 

机构地区：[1]郑州大学电气工程学院,郑州450001 [2]国网河南省电力公司河南电力调度控制中心,郑州450052

出　　处：《电瓷避雷器》2015年第6期92-96,共5页Insulators and Surge Arresters

基　　金：国家自然科学基金(编号:51307152)

摘　　要：准确计算接地装置的冲击散流性能以及输电线路接地极动态冲击特性是优化接地网设计的基础。为了得到垂直接地极的散流特性以及各种因素对垂直接地极散流特性的影响,本文提出基于电磁场的有限元分析方法,对垂直接地极冲击散流特性的动态物理过程进行建模和仿真,在此基础上分析了垂直接地极的冲击散流特性;并进行了垂直接地极的模拟实验,通过对比验证了方法的正确性。结果表明,垂直接地极的散流具有明显的末端效应。The accurate calculations for the dispersing characteristics of ground device and for the dynamic impulse characteristics of transmission line grounding electrode are the basis to optimize the design of the ground net. In order to get the dispersing characteristics of vertical grounding electrodes and the influence of various factors,based on the electromagnetic finite element analysis method, the dynamic physical process of the dispersing characteristics are modeled and simulated. Base on this, the impulse dispersing characteristics of the vertical grounding electrodes are analyzed; and the simulation experiments of vertical grounding electrodes are carried out, the validity of the method is verified by comparison. The result shows that the dispersing of vertical grounding electrode has an obvious end effect.

关 键 词：接地极 有限元方法 散流特性 火花放电 电流分布 

分 类 号：TM862[电气工程—高电压与绝缘技术]