Proposal and analysis of three-phase filter by using mixed-mode S-parameter based on Fortescue transformation

Y. Fujishiro, K. Koshiji
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引用次数: 4

Abstract

In this paper, we propose a new method for evaluation of a three-phase filter, utilizing a “mixed-mode S-parameter based on Fortescue transformation.” Because the positive phase sequence is the main component of current in a three-phase circuit, it is necessary to be able to analyze this response. Moreover, it is important to assess the effects of the zero phase sequence in order to investigate both conductive and radiative noise. To perform these analyses, it is useful to transform voltage and current into symmetrical coordinates, which leads to the mixed-mode S-parameter. Measurement examples based on this method are given in this paper. Because three-phase filters with cyclic symmetry have zero matrices as off-diagonal blocks in the mixed-mode S-matrix, each phase sequence becomes independent and non-interactive. Accordingly, by using the multi-section theorem, we can decompose the filter into modal equivalent circuits; the results calculated with these circuits agree well with those obtained from the measurement.
基于Fortescue变换的混合模式s参数三相滤波器的提出与分析
在本文中,我们提出了一种新的评估三相滤波器的方法,利用“基于Fortescue变换的混合模式s参数”。由于正相序是三相电路中电流的主要组成部分,因此有必要能够分析这种响应。此外,为了研究导电和辐射噪声,评估零相序的影响是很重要的。为了进行这些分析,将电压和电流转换成对称坐标是有用的,这导致了混合模式s参数。文中给出了基于该方法的测量实例。由于具有循环对称性的三相滤波器在混合模式s矩阵中以零矩阵作为非对角块,因此每个相序变得独立且不相互作用。据此,利用多段定理,将滤波器分解为模态等效电路;电路计算结果与实测结果吻合较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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