【摘要】 为了更好的解决电磁兼容的问题,根据电磁场理论对以往提出的瞬态电磁波对电缆耦合效应的模型进行了改进。将一种多层阻抗计算模型应用到单层电缆的计算方法中,对空中和地下的不同层数屏蔽电缆的表皮感应电流、内部感应电压和电流分别进行了分析和计算,并对两种不同结构电缆的内部感应电压进行了比较。仿真结果表明:采用多层电缆可以减少电磁波对电缆内部的耦合,为电磁兼容的预测和设计提供了一种较好的方法。更多还原

【Abstract】 For better solving the problems of electromagnetic compatibility according to the theory of electromagnetic field the coupled to shielded cables previous model of the effect of the transcient electromagnetic wave is improved. A new computation model of the multilayers impedance is used to the traditional monolayer compatation method, the sheath induced current, internal induced voltage and current for the aerial and buried different layers shielded cables are analysed and calculated respectively, and the internal induced voltages of the two kinds of configuration cables over compared. The simulation results show that multilayer shielded cables can reduce the coupling of electromagnetic wave to the inner of cables. A better mothod for prediction and design of electromagnetic compability is provided.更多还原