冶金动力
冶金動力
야금동력
METALLURGICAL POWER
2014年
3期
10-12
,共3页
感应电压%环流%交叉互联
感應電壓%環流%交扠互聯
감응전압%배류%교차호련
induced voltage%convective current%cross connection
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。
由于35 kV單芯電纜屏蔽存在單點或多點接地，在運行過程中屏蔽層產生感應電壓，屏蔽層形成環流，使電纜髮熱，加速老化，甚至形成很高的感應電壓，擊穿電纜外護套。針對這種現象，對35 kV長距離單芯電纜屏蔽實施交扠互聯，有效降低感應電壓，保證電纜的安全穩定運行。
유우35 kV단심전람병폐존재단점혹다점접지，재운행과정중병폐층산생감응전압，병폐층형성배류，사전람발열，가속노화，심지형성흔고적감응전압，격천전람외호투。침대저충현상，대35 kV장거리단심전람병폐실시교차호련，유효강저감응전압，보증전람적안전은정운행。
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.
