雷击高塔附近埋地线缆耦合数值分析

Numerical Researches on the Coupling of Buried Lines near a Tower Stuck by Lightning

本文采用FDTD两步法建模,仿真分析了雷击高塔附近,埋地线缆的雷电电磁脉冲耦合。数值计算结果表明,与雷击大地情况相比,雷击高塔时埋地线缆感应电压幅值更高。感应电压波形也存在较大差异,持续时间变长并且出现衰减振荡。仿真结果对于高建筑物附近埋地线缆的防护具有指导意义。

This paper is presented to simulate the coupling of buried lines near a tower stuck by lightning,by employing the two-step FDTD scheme.The numerical results show that,compare to the direct ground lightning,the high tower lightning induced higher voltages on buried lines around.And the induced voltage waveform has longer duration and displays damped oscillation.The simulating result has great reference value to the lightning protection of the buried line near high tower.