摘要
通过分析电流互感器(TA)与永磁铁的相对位置,推导了外部恒定磁场对TA传变特性影响的定量关系式,并得出了以下结论:外部恒定磁场对TA的影响在有恒定交链磁通绕组处与直流偏磁相似,随着外部磁感应强度增加,TA传变误差增大,同时在输出中产生大量谐波,严重影响电能计量的结果。
Abstract：By analyzing the position of CT（Current Transformer） relative to permanent magnet,the quantitative relationship between the external constant magnetic field and its impact on the transfer characteristics of CT is deduced and the conclusions are obtained：the impact of external constant magnetic field on the transfer characteristics of CT is similar to that of DC bias at the windings with constant linkage flux,the transfer error of CT increases along with the increase of external magnetic induction intensity,and there is a great deal of harmonics in its output signal,seriously affecting the measurements.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第11期100-104,共5页
Electric Power Automation Equipment
关键词
电流互感器
永磁铁
外部恒定磁场
传变特性
current transformers
permanent magnet
external constant magnetic field
transfer characteristics
