电压互感器二次侧多点接地的危害分析  

Hazard analysis of multi-point grounding on secondary side of voltage transformer

作　　者：谭金龙 王廷旺 胡帅[1] 张良武 袁焕炯 Tan Jinlong;Wang Tingwang;Hu Shuai;Zhang Liangwu;Yuan Huanjiong(Xinjiang Electric Power Research Institute of State Grid,Urumuqi Xinjiang,830000;Maintenance Company of State grid Xinjiang Electric Power Co.,LTD,Xinjiang Urumuqi,830000;Guangzhou Qianshun Electronic Equipment Co.,LTD,Guangzhou Guangdong,510000)

机构地区：[1]国网新疆电力科学研究院,新疆乌鲁木齐830000 [2]国网新疆电力有限公司检修公司,新疆乌鲁木齐830000 [3]广州市仟顺电子设备有限公司,广东广州510000

出　　处：《电子测试》2022年第6期102-103,115,共3页Electronic Test

摘　　要：电压互感器是反应高压电网运行状况的设备,其回路所带的测量仪表、自动装置和继电保护等设备对电网的稳定运行起至关重要的作用。为保证设备和人员的安全,变电站电压互感器设计有一个可靠接地点,但互感器出现两点及以上的接地点时,可能会引起互感器二次侧电压异常,导致保护误动、拒动等事故。本文简要分析互感器二次侧不同类型的接地危害,呼吁大家重视互感器二次侧多点接地故障,及时排除故障。The voltage transformer is the equipment that reflects the running,condition of the high voltage power network.The measuring instrument,automatic device and relay protection equipment carried in the circuit play a vital role in the stable operation of the power network.In order to ensure the safety of equipment and personnel,the transformer is designed to have a reliable connection point.However,when the transformer appears at two or more points,the secondary side voltage of the transformer may be abnormal,leading to accidents such as misoperation and refusal of protection.This paper briefly analyzes the different types of grounding hazards of the secondary side of the transformer,and calls for attention to the multi-point grounding faults of the secondary side of the transformer and timely troubleshooting.

关 键 词：电网安全 电压互感器 多点接地 

分 类 号：TM451[电气工程—电器]