摘要
由于35 kV单芯电缆屏蔽存在单点或多点接地,在运行过程中屏蔽层产生感应电压,屏蔽层形成环流,使电缆发热,加速老化,甚至形成很高的感应电压,击穿电缆外护套。针对这种现象,对35 kV长距离单芯电缆屏蔽实施交叉互联,有效降低感应电压,保证电缆的安全稳定运行。
Due to single-point and multi-point grounding of the shield of the 35 kV single-core cable, induced voltage is generated and convective current formed in the shielding layer, which heats the cable, accelerates aging of the cable and even forms high induced volt-age to breakdown the outer sheath of the cable. To solve this problem, the shielding of long-distance 35 kV single-core cable was cross connected, effectively reducing induced volt-age and ensuring safe and stable operation of the cables.
出处
《冶金动力》
2014年第3期10-12,共3页
Metallurgical Power
关键词
感应电压
环流
交叉互联
induced voltage
convective current
cross connection
