Characteristic Analysis of Lightning Induced Voltage in Power Cables
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Abstract:
Based on the lightning protective experiments of automatic weather stations, the characteristics of lightning induced voltage in power cables with different burying situations are analyzed.The results show that soil has significant shielding effect on LEMP (Lightning ElectroMagnetic Pulse) of return strokes. Compared with the peak lightning induced voltage in the power cable on the ground, the peak value of the induced voltage under the depth of 05 meters is 522%. The induced voltage shows an oscillation waveform with a tendency of attenuation. At the same time, the induced voltages of buried power cables show a smaller amplitude in the frequency from 50 kHz to 5 MHz. The decreasing in the frequency from 9055 kHz to 1535 MHz is more obvious.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.