220 kV升压站母线PT二次回路接地故障分析及处理措施  

A 220 kV Booster Station Bus PT Secondary Circuit Grounding Analysis and Treatment Measures

作　　者：张小伟 朱建华 李冬冬 ZHANG Xiaowei;ZHU Jianhua;LI Dongdong(Rundian Energy Science and Technology Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]润电能源科学技术有限公司,河南郑州450000

出　　处：《电工技术》2021年第19期102-105,共4页Electric Engineering

摘　　要：针对某新投运的220 kV升压站内一起母线PT二次回路接地故障事件进行了分析,发现故障原因为开关内部配线工艺不符合规范要求,在GIS开关多次合闸振动作用力下导致母线PT二次电缆绝缘损坏,造成互感器B相二次电缆发生金属接地故障,并提出了针对性处理措施,为避免同类问题发生提供了借鉴。A grounding fault event of bus PT secondary circuit in a newly put into operation 220 kV booster station is analyzed.It is found that the cause of the fault is that the internal wiring process of the switch does not meet the requirements of the specification,and the insulation of the PT secondary cable of the busbar is damaged under the vibration force of the GIS switch multiple times,resulting in a metal ground fault in the B-phase secondary cable of the transformer.Targeted treatment measures are put forward,which provides a reference for avoiding similar problems.

关 键 词：电压互感器 二次回路 接地 

分 类 号：TM451[电气工程—电器]