Numerical simulation of the HEMP induced current in cable shielding near ground

In this paper, the transmissionline method are used to calculate the HEMP induced skin current in cable shielding near ground. The change law of cable skin current with waveform injecting field, cable length and grounding state of shielding layer of cable was obtained. The calculating results indicate that the waveform of skin current is closely related with the skingrounding condition and when the peak magnitudes of injecting field are uniform, the wider the waveform of injecting field, the larger the skin current. A part of calculated results are compared with the calculated ones of FDTD method and experimental ones. There is good consistence between them.