測量用電流互感器鐵芯材料對剩磁的影響
于泳,汪良坤,連濤,樊世偉
東南大學 電氣工程學院,江蘇 南京 210096
摘 要:針對剩磁問題分析了電流互感器產(chǎn)生剩磁的原因和剩磁所造成的影響,分別采用不同材料(硅鋼片、坡莫合金、超微晶合金)做鐵芯在EMTP-ATP中建模仿真,得出電流波形圖。將有無剩磁情況下的二次側(cè)電流波形分別導入MATLAB/SIMULINK軟件的RMS模塊進行計算,比較三種材料的相差和比差。仿真結(jié)果表明,坡莫合金誤差最小,硅鋼片誤差最大。
關(guān)鍵詞:測量;電流互感器;剩磁;鐵芯材料
中圖分類號:TM452 文獻標識碼:A 文章編號:1007-3175(2013)06-0011-04
Impacts of Iron Core Materials of Measuring Current Transformers on Residual Magnetism
YU Yong, WANG Liang-kun, LIAN Tao, FAN Shi-wei
School of Electrical Engineering, Southeast University, Nanjing 210096, China
Abstract: Aiming at residual magnetism problem, this paper analyzed the residual magnetism and its influence caused by transformers. Different materials (silicon steel plate, permalloy, super micro crystal alloy) were taken to make iron core for simulation moulding in EMTP-ATP software, so as to get current waveform diagram. Current waveform at secondary side was guided into RMS module in Simulation of Matlab to carry out calculation and to make comparison of difference for the three materials. Simulation results show that permalloy is the minimum in error and silicon steel plate is the maximum in error.
Key words: measurement; current transformer; residual magnetism; iron core material
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