随机耦合模型预测变电站保护小间内耦合电磁量的应用研究

本文利用电磁仿真软件建立了变电站保护小间的混响室模型,并对模型内同轴电缆的散射参数和终端感应电压进行了仿真。再利用随机耦合模型计算了同轴电缆终端感应电压的概率密度函数,并与仿真得到的感应电压概率密度函数作对比,证明了随机耦合模型在变电站保护小间内耦合电磁量预测中的有效性,为变电站保护小间的电磁防护提供了指导。

A reverberation chamber model duced to the physical prototype of substation protection small-room is put forward in this paper.The scattering parameters and the induced voltage of coaxial cable terminal are simulated by electromagnetic simulation software and the induced voltage of coaxial cable terminal is calculated by Random Coupling Model(RCM),then the probability density function(PDF)of induced voltage by simulation and by RCM are compared to verify the applicability of RCM in the prediction and analysis of coupling electromagnetic quantities in substation protection small-room.The conclusion in this paper can provide guidance for electromagnetic protection of substation protection small-room.