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架空多导体传输线缆的电磁脉冲响应计算
引用本文:谢彦召,王赞基,王群书,周辉.架空多导体传输线缆的电磁脉冲响应计算[J].清华大学学报(自然科学版),2006,46(4):449-452.
作者姓名:谢彦召  王赞基  王群书  周辉
作者单位:1. 清华大学,电机工程与应用电子技术系,电力系统及大型发电设备安全控制国家重点实验室,北京,100084;西北核技术研究所,西安,710024
2. 清华大学,电机工程与应用电子技术系,电力系统及大型发电设备安全控制国家重点实验室,北京,100084
3. 西北核技术研究所,西安,710024
摘    要:地面电子设备之间的多根互连平行线缆受高空核爆电磁脉冲(HEM P)作用,会产生瞬态电磁效应。为研究这个问题,该文建立了考虑有耗地面影响等因素的多导体传输线模型,给出了一种类似“状态转移矩阵”表达的方程解的形式,并以相模变换的方法推导了解的具体表达式。该模型可以同时考虑空间电磁脉冲场在线缆上感应的瞬态电压和电流。仿真计算结果表明,对于平行放置的多根线缆而言,接地平行线缆对临近平行线缆有一定程度的屏蔽作用,可供防护设计时参考。

关 键 词:高空核电磁脉冲  多导体传输线缆  传输线理论  大地电导率
文章编号:1000-0054(2006)04-0449-04
修稿时间:2005年2月1日

Calculation of HEMP coupling to aerial multi-conductor transmission lines
XIE Yanzhao,WANG Zanji,WANG Qunshu,ZHOU Hui.Calculation of HEMP coupling to aerial multi-conductor transmission lines[J].Journal of Tsinghua University(Science and Technology),2006,46(4):449-452.
Authors:XIE Yanzhao  WANG Zanji  WANG Qunshu  ZHOU Hui
Abstract:HEMP(high-altitude electromagnetic pulse) coupling to multi-conductor aerial transmission lines over lossy ground was studied in this paper.An above-ground multi-conductor transmission line model was developed which takes into account wire-to-wire coupling and earth reflections.The influence of lossy ground was included by using the Sunde approximation equation when dealing with the diagonal and off-diagonal ground impedance terms.The transient current and voltage induced at an arbitrary point on the line can predicted by the model in terms of a state-transition-like matrix.The generalized telegrapher's equations were solved in the presence of an external electromagnetic pulse excitation using a modal transform.The computed results for several line configurations show a shielding effect by the other grounded conductors.
Keywords:high-altitude electromagnetic pulse(HEMP)  aerial multi-conductor transmission line  transmission line theory  ground conductivity  
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