外场激励下架空线响应分布规律的概率分析  

Research on probability distribution of coupling responses of transmission lines externally excited by electromagnetic field

作　　者：卢斌先[1] 罗艳华[1] 张宪军[1] 王泽忠[1] 齐磊[1] 

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206

出　　处：《强激光与粒子束》2008年第5期819-823,共5页High Power Laser and Particle Beams

基　　金：国家杰出青年科学基金资助课题(50325723);长江学者和创新团队发展计划资助项目(IRT0515)

摘　　要：应用蒙特卡罗法和传输线耦合响应计算公式分析了瞬态外场激励下传输线耦合响应的分布规律。分析对象为二导体架空线和以大地为回路的多导体架空线。分析中将电磁波的入射参数,包括极化角、入射角和方位角作为一组随机变量,并由计算机随机产生。应用瞬态外场激励下二导体传输线终端耦合响应的解析公式和多导体传输线节点导纳方程分别分析端接传输线耦合电流和耦合电压响应绝对值的峰值,并得出响应的概率分布曲线。当传输线入射参数在[0,π/2]范围内变化时,对于二导体架空线终端电流而言,随着终端端接电阻的不同,架空线近端与远端的电流响应绝对值峰值的概率分布曲线不同。对于共地三导体架空线来说,在接相同端接电阻的情况下,远端高电压分布概率大于近端的分布概率,中间导体近远两端在高电压区域分布概率要比两边导体低。Based on the nodal admittance method which is convenient to analyze the responses at terminals of multiconductor transmission lines excited by EM field, Mento Carlo method for the characterization of wiring-harness susceptibility to external interference was applied. Field-coupling onto two-conductor transmission line and multiconductor transmission line loaded by terminal resistances were considered. The external field was modeled by a plane wave with random parameters as polarization angle, incident angle and azimuth angle generated by computer. The response formulas of two-conductor and multiconductor line were applied , and the peak value of voltages or currents was computed for every set of random values. For incident parameter range of [0,π/2], the probability distributions of terminal currents and voltages were investigated. The current probability at near and far ends of transmission line are quite different as the terminal resistances are varied. For three-conductor transmission line, the near and far ends of the middle conductor have different probability distributions of high terminal voltages, which are lower than those of the other two conductors.

关 键 词：耦合多导体传输线 节点导纳方程 Taylor模型 蒙特卡罗法 电磁场 

分 类 号：TN972.2[电子电信—信号与信息处理]