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基于改进矢量匹配法的变压器铁芯频变涡流模型

DOI: 10.13336/j.1003-6520.hve.2015.05.027, PP. 1618-1623

Keywords: 变压器,铁芯,涡流建模,频关效应,矢量匹配法,电路综合,集肤效应

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Abstract:

针对变压器建模中铁芯涡流的频变问题,基于改进的矢量匹配法建立了变压器铁芯的频变涡流模型。从铁芯叠片涡流阻抗表达式出发,用改进的矢量匹配法对其进行拟合,拟合带宽为10Hz~10MHz,并给出了拟合误差分布。在此基础上用电路综合的方法建立了其6阶电路模型;最后通过与现有实现方式进行误差对比,最大误差从10.48%降低到0.17%,提高了模型的准确性。结果表明,该方法简便、准确,使用该方法可提高变压器宽频建模的准确性,同时为变压器铁磁谐振等相关建模问题提供参考。

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