电感型避雷针提高线路反击耐雷性能机理  

Mechanism of Improving the Lighting Protection Performance of Back-flashover Due to Inductive Lightning Rod

作　　者：韩永霞[1] 张杰[1] 阮耀萱 唐力 戴栋[1] 李立浧[1] 

机构地区：[1]华南理工大学电力学院,广州510640 [2]南方电网科学研究院有限责任公司直流输电技术国家重点实验室,广州510080

出　　处：《高电压技术》2016年第11期3456-3463,共8页High Voltage Engineering

基　　金：国家自然科学基金(51541704);广东省自然科学基金(2014A030313249);特高压工程技术(昆明;广州)国家工程实验室开放基金(NEL201404)~~

摘　　要：新的防雷机理及防雷措施一直是国内外研究的热点和难点,因此针对电感型避雷针探索其防雷机理并评价其防雷效果。首先,基于有限元分析建立电感型避雷针的链式等效电路模型,探索模型中各参数的影响因素。其次,基于PSCAD/EMTDC电磁暂态程序建立了输电线路耐雷性能仿真模型,仿真对比了塔顶是否安装及安装电感型避雷针参数不同时对反击耐雷水平的影响,获得了模型参数对反击耐雷水平影响的三维曲面图及等高线图。仿真表明:L0越大线路反击耐雷水平越高,某L_0下C_0存在最优值使得反击耐雷水平最高(可提高40%)。此外,链式等效电路幅频响应分析和电磁暂态分析结果与上述结论一致。最后,结合实际问题开展了样品设计的研究,并提出其材料特性要求。The research of new mechanism and new measures of lightning protection have always been hot and difficult at home and abroad. Consequently, analyzing inductive lightning rods, we investigated the mechanism and evaluated its lightning protection effect. First of all, based on the finite element analysis, the chain equivalent circuit model of inductive lightning rod was established and the influencing factors on its parameters were studied. Secondly, based on the electromagnetic transient program PSCAD/EMTDC, the lightning protection simulation model of transmission line was established. The effect of the installation of inductive lightning rod and different parameters on the back flashover level was studied and reflected through the 3-D surface chart and the contour map. The simulation results show that the back flashover level increases with the increase of L0. And in the case of a fixed L0, there is an optimal value of Co that makes the highest level of back flashover （increased 40%）. Furthermore, the study results of the amplitnde-frequency response analysis and the electromagnetic transient analysis of the chain equivalent circuit are consistent with the above results. Finally, combined the practical experiences, the sample is designed, and the characteristics of the material are put forward.

关 键 词：电感型避雷针 链式等效电路 分布电容 电磁暂态仿真 反击耐雷水平 幅频响应 时频域分析 

分 类 号：TM863[电气工程—高电压与绝缘技术]