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首页> 外文期刊>Electric Power Components and Systems >Strand Current Distribution Modeling in Turbo-generators Using Finite-element Method Based on Proposed Dual Method
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Strand Current Distribution Modeling in Turbo-generators Using Finite-element Method Based on Proposed Dual Method

机译：基于拟对偶方法的有限元方法在汽轮发电机链股电流分布建模中的应用

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摘要

The necessity of using a 3D model is one of the main problems for modeling Roebel bar transposition in turbo-generators by the finite-element method. This article proposes a 2D dual model for computing strand current distribution in the Roebel bar of turbogenerators. Considering the leakage and mutual inductances for each strand and the coupling inductances between them, the end winding region is modeled in this 2D dual model. In this article, the Roebel bar structure including 16 strands was considered, and these distributions are calculated for different transpositions using the finite-element method. In the finite-element method model, the circulating currents are calculated by subtracting a load current at each strand from the total of strand current. Also, for different transpositions, such as 90°, 180°, 360°, and 540° , the circulating currents are calculated using an analytical method. The obtained strand current distributions from the 2D dual model have good agreement with the obtained results from the analytical method for the 180° and 360° transposed coil models.
机译：使用3D模型的必要性是通过有限元方法对涡轮发电机中Roebel棒换位进行建模的主要问题之一。本文提出了一种二维对偶模型，用于计算涡轮发电机Roebel杆中的股线电流分布。考虑到每一股的泄漏和互感以及它们之间的耦合电感，在此二维对偶模型中对端部绕组区域进行了建模。在本文中，考虑了包括16条链的Roebel钢筋结构，并使用有限元方法针对不同的换位计算了这些分布。在有限元方法模型中，通过从总股电流中减去每一股的负载电流来计算循环电流。而且，对于不同的换位，例如90°，180°，360°和540°，使用分析方法计算循环电流。从二维对偶模型获得的股线电流分布与从180°和360°换位线圈模型的分析方法获得的结果具有良好的一致性。

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