非均匀外磁场对罗氏线圈的干扰研究  

Research on the interference of non-uniform magnetic field to the Rogowski coil

作　　者：池立江 颜语 汶占武[2] 

机构地区：[1]许继电气有限公司,河南许昌461000 [2]杨凌职业技术学院,陕西杨凌712100

出　　处：《电力系统保护与控制》2011年第15期151-154,共4页Power System Protection and Control

摘　　要：相对现有罗氏线圈磁场分析方法,提出一种新的方法,分析外界非均匀磁场对罗氏线圈的干扰。根据相邻电力线在线圈远近两侧产生的感应磁场方向,将其分成两部分,分别分析,并求出产生总的感应电动势恒为零。从而得出在罗氏线圈截面积和匝数密度均匀的条件下,非均匀磁场不会对罗氏线圈产生干扰。通过仿真实验,得出结论:罗氏线圈结构理想时,外界磁场对罗氏线圈不产生干扰,罗氏线圈性能稳定、能够满足精度要求。A new method to analyze the interference of non-uniform magnetic field to the Rogowski coil is proposed.According to the magnetic direction at Rogowski coil＇s two sides,which is created by adjacent electrical wires,this paper divides the structure into two parts,analyzes them respectively and calculates that the total induced electromotive force generated identically equals to zero.From the fact,we can come to a conclusion that non-uniform magnetic field will not interfere with the Rogowski coil,on the premise that the turns density and cross-sectional area are uniform.At last,computer simulation shows that when the Rogowski coil is ideally structured,it can avoid the effect of non-uniform magnetic field,and the Rogowski coil has stable performance,which meets the accuracy requirements.

关 键 词：电流检测 罗氏线圈 磁场 干扰 屏蔽 仿真 

分 类 号：TM55[电气工程—电器]