Multiscale Computations of Parameters of Power Transformer Windings at High Frequencies. Part I: Small-Scale Level
Multiscale Computations of Parameters of Power Transformer Windings at High Frequencies. Part I: Small-Scale Level
复制标题
高频电力变压器绕组参数的多尺度计算。
DOI：
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发表时间：
2007
影响因子：
2.1
通讯作者：
S. Gubanski
中科院分区：
文献类型：
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作者：
A. Podoltsev;K. Abeywickrama;Y. Serdyuk;S. Gubanski
提出了一种分层多尺度的电力变压器高频现象建模方法。该方法基于两个空间层次上的高频效应。本文的第一部分集中在一个小尺度水平上，研究了变压器绕组导线中的涡流以及几何和邻近效应。建立了变压器绕组各向异性频变抗磁特性的计算机模型，并将其表示为具有周期结构的复合介质。叠层变压器铁心的有效特性计算考虑了薄板的各向异性磁性。由此得到的变压器元件的频率相关参数将在第二部分中进一步用于计算大范围的绕组的有效电感和电阻以及积分损耗，即整个变压器。
We propose a hierarchical multiscale approach to modeling of high-frequency phenomena in power transformers. The method is based on considering high-frequency effects on two spatial levels. Part I of the paper focuses on a small-scale level where eddy-current as well as geometrical and proximity effects in conductors of transformer windings are examined. It develops a computer model that accounts for anisotropic frequency-dependent diamagnetic properties of transformer windings, which are represented as composite media with periodic structure. Calculations of effective characteristics of the laminated transformer core take into account anisotropic magnetic properties of steel sheets. The frequency-dependent parameters of transformer elements thus obtained will be further used in Part II for computing effective inductances and resistances of windings and integral losses on a large-scale level, i.e., for the whole transformer.