摘要
针对两起输煤6 kV 3×185 mm^2高压铠装电缆中间头接地故障与A段保护越级跳闸事件,阐述了电缆接地故障查找方法、解决措施及带中间接头电缆的预防措施等,同时,剖析了故障电缆在更换过程中,将电缆屏蔽线接地线接错,导致保护越级跳闸的事件原因,对于避免电压等级相近的电缆故障查找、处理与预防具有一定意义。
Aiming at the grounding fault of 6 kV 3×185 mm^2 high voltage armored cable for coal transportation, this paper expounds the cable grounding fault finding methods, solutions and preventive measures for cables with intermediate joints. In the process of replacing the faulty cable, the cause of the event that the shielding wire of the cable is wrongly connected, which leads to the override trip of the protection is deeply analyzed. It has certain reference significance for the cable fault detection and treatment with similar voltage level.
作者
刘德
于慧丽
赵利权
谢绍魁
LIU De;YU Huili;ZHAO Liquan;XIE Shaokui(lHuaneng Jilin Power Generation Co.,Ltd.Jiutai Power Plant,Changchun 130501,China;Huaneng Jilin Power Generation Co.,Ltd.Changchun Thermal Power Plant,Changchun 130000,China;State Grid Jilin Electric Power Co.,Ltd.Electric Power Research Instirute,Changchun 130021,China)
出处
《吉林电力》
2020年第5期53-56,共4页
Jilin Electric Power
关键词
电缆
接地
保护跳闸
电流互感器
cable
grounding
protection trip
current transformer
