双绞线耦合雷电电磁脉冲特性的分析  

Analysis on Lightning Electromagnetic Pulse Characteristics of Twisted Pair

作　　者：李祥超[1] 徐晓培[1] 董昌鑫[1] 蔡露进 杨悠[1] 

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心,南京210044

出　　处：《电瓷避雷器》2018年第1期1-7,共7页Insulators and Surge Arresters

基　　金：973国家重点基础研究计划(编号:2014CB441405)

摘　　要：针对双绞线耦合雷电电磁脉冲的问题,利用试验和理论相结合的方法,建立了双绞线接收雷电电磁脉冲的试验模型,得到了双绞线耦合雷电电磁脉冲电压及频谱特征,试验结果得出:1)双绞线间接入100Ω匹配电阻的情况:双绞线的耦合电压随着冲击电流的增大而增大,可是增加线缆高度对双绞线的耦合电压并没有太大影响。2)双绞线对地接入负载电阻的情况:在相同高度下,双绞线的耦合电压与负载电阻值呈正相关关系;在电阻不变的情况下,高度越高,耦合电压值越大。3)耦合电压的频谱特性:频率主要集中在8 k Hz和2.3 MHz这两个频点周围且耦合电压的幅值与负载电阻和冲击电流皆成正比例关系。试验结果与理论分析基本吻合。研究结果对双绞线耦合雷电电磁脉冲的抑制有一定的指导意义。Aiming at the problem of the lightning electromagnetic pulse of twisted pair and method of combining experiment and theory, a test model of the lightning electromagnetic pulse of the twisted pair is established, and the voltage and spectrum characteristics of the lightning electromagnetic pulse are obtained. Test results are obtained：1） In the case of the 100 twisted pair matching resistance： the cou- pling voltage of the twisted pair increases with the increase of the impulse current, but the increase of the cable height is not much affected by the coupling voltage of the twisted pair. 2） Twisted pair access load resistance： in the same height, twisted pair coupling voltage and load resistance value of a positive corre- lation; in the case of a constant resistance, the higher the altitudes is, the greater the coupling voltage value is. 3） The frequency spectrum characteristics of the coupling voltage： the frequency is mainly concen- trated in the 8 kHz and 2.3 MHz around the two frequency points and the amplitude of the coupling volt- age spectrum is proportional to the load resistance and the impulse current. The experimental results are in agreement with the theoretical analysis. The research results have certain guiding significance for the suppression of the lightning electromagnetic pulse of twisted pair.

关 键 词：双绞线 耦合 雷电电磁波 频谱 

分 类 号：TM86[电气工程—高电压与绝缘技术]