| 引用本文: | 刘 钢,付志红,侯兴哲,郑 可,欧习洋.外部恒定磁场对电流互感器传变特性影响分析[J].电力自动化设备,2013,33(11): |
| LIU Gang,FU Zhihong,HOU Xingzhe,ZHENG Ke,OU Xiyang.Impact of external constant magnetic field on transfer characteristics of current transformer[J].Electric Power Automation Equipment,2013,33(11): |
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| 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。 |
| 关键词: 电流互感器 永磁铁 外部恒定磁场 传变特性 |
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| Impact of external constant magnetic field on transfer characteristics of current transformer |
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LIU Gang1, FU Zhihong1, HOU Xingzhe2, ZHENG Ke2, OU Xiyang2
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1.State Key Laboratory of Transmission Equipment & System Security and New Technology，Chongqing University， Chongqing 400044，China;2.Chongqing Electric Power Research Institute，Chongqing 401123，China
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| 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. |
| Key words: current transformers permanent magnet external constant magnetic field transfer characteristics |
