Analytic computation of the magnetizing inductance of current instrument transformers under consideration of eddy currents

Analytic computation of the magnetizing inductance of current instrument transformers under consideration of eddy currents
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考虑涡流的电流互感器励磁电感的解析计算

DOI:
10.1109/tmag.2015.2438320
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发表时间:
2015
期刊:
2015 IEEE Magnetics Conference (INTERMAG)
影响因子:
--
通讯作者:
Schegner P.
Schegner P.
中科院分区:
--
文献类型:
--
作者:
Jäschke C;Schegner P.

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本文提出了一种计算电流互感器常规等效电路中随频率变化的磁化电感和铁损电阻的解析方法。这个模型考虑了涡流的影响,它在更高的频率下更为明显。此外,该模型还考虑了常用的环形层压铁芯的特性,这种特性是由于层压的螺旋绕组而产生的。磁芯的磁通是根据麦克斯韦方程组计算的。为了得到一个更简单和数值稳定的通量方程,对发生的贝塞尔函数进行了近似。最后,利用导出的磁通方程计算等效电路的参数。利用CT的参数给出了该模型的结果。
In this paper, an analytical method is presented to compute the frequency-dependent magnetization inductance and iron losses resistance of the conventional equivalent circuit of current instrument transformers (CTs). This model considers the effect of eddy currents, which are more pronounced at higher frequencies. Furthermore, this model considers the characteristics of the commonly used toroidal laminated cores, which occur due to the spiraled windings of the lamination. Magnetic flux in the core is computed based on Maxwell's equations. To get a more simple and numerically stable equation for the flux, the occurring Bessel functions are approximated. Finally, the parameters of the equivalent circuit are computed using the derived equation of the magnetic flux. The results of the proposed model are presented using the parameters of a CT.
DOI: --
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期刊:
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通讯作者: C. F. Foo
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影响因子: 2.1
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