摘要
针对雷电电磁波在埋地电缆线路中的耦合感应电压问题,通过试验研究了埋地电缆屏蔽层接地方式、与雷电波位置关系对于屏蔽效果的影响。结果表明,埋地电缆采用屏蔽层有助于屏蔽部分外界雷电波的干扰;当电缆垂直于雷电波时,其屏蔽层屏蔽效果比电缆平行雷电波时的屏蔽效果差;屏蔽层接地方式对屏蔽层屏蔽效能有影响,屏蔽层接地电阻越小,屏蔽效能越好。
Aiming at the problem of electromagnetic coupling of the buried cable induced by lightning, the influence on shielding effectiveness was researched through measurements with different shielding layer grounding modes and different directions of polarization of lightning wave. The measurement results showed that the shielding layer of buried cable could reduce induced voltage cause by lightning wave coupling, and the less grounding resistance of shielding layer, the better shielding effectiveness of the buried cable. Compared with vertical coupling, the shielding effectiveness is better for parallel coupling of shielded buried cable.
关键词
埋地电缆
雷电波
屏蔽效能
能量
buried cable
lightning wave
shielding effectiveness
energy
