基于“置空后注入”的铁芯接地电流监测装置现场检验技术  

Field Inspection Technology of the Core Grounding Current On-line Monitoring Device Based on the“Inject after Emptying the Current”

作　　者：贺家慧[1] 王永勤[1] 童歆[1] 周启义 罗浪[3] 赵海涛[3] 

机构地区：[1]国网湖北省电力公司电力科学研究院,湖北武汉430077 [2]国网荆州供电公司,湖北荆州434000 [3]国网湖北省电力公司检修公司,湖北武汉430050

出　　处：《湖北电力》2015年第12期40-44,共5页Hubei Electric Power

摘　　要：本文提出一种基于"置空后注入"的铁芯接地电流监测装置现场检验技术,即采用高精度传感器实时跟踪运行中的铁芯接地电流,将其抵消置空后再注入标准电流进行校验。注入的电流与实际铁芯接地电流特征类似,为幅值可调的混频电流。通过对某500kV变电站铁芯接地电流在线监测装置现场检验,验证了本方法的可行性与有效性。In this paper,a new method based on ＂inject after emptying the current＂is proposed for the field inspection of the core current monitoring device.High precision sensor is used to track the core current in the running monitoring device,after emptying the current,standard current is injected for verification.The injected current is similar to that of the actual iron core,which is a mixed current with adjustable amplitude.The feasibility and effectiveness of the method are verified by the field test of the on-line monitoring device of the core of a 500 kV transformer substation.

关 键 词：铁芯接地电流 在线监测 现场检验 跟踪 抵消 

分 类 号：TM721.1[电气工程—电力系统及自动化]