Three-phase four-leg inverter based on current positive feedback control

2016 International Conference on Integrated Circuits and Microsystems (ICICM) Pub Date : 2016-11-01 DOI:10.1109/ICAM.2016.7813577

Wang Xiangqing, Z. Xiaoyong, Fu Maosheng

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引用次数: 4

Abstract

The power quality of grids has been influenced by the mounting number of asymmetric loads. Recently, the three-phase four-leg inverter which adds a bridge to three-phase three-bridge inverter has been researched because of the merit of the compact structure, small bulk and high efficiency. The three-phase four-leg inverter has subsequently brought vigor into the power system with broad application prospects but its control method becomes much more complex than ever and difficult to achieve. Therefore, a new control method has been proposed in this paper based on positive feedback of current control and three-dimensional space vector modulation (SVM). Through analyzing the four-leg inverter system, three-phase unbalanced current is introduced from the three-phase voltage feedback control. Furthermore, the amount of imbalance is increased through positive feedback in order to control the balanceness of three-phase output voltage more quickly and accurately. The simulation showed the feasibility and effectiveness of the method proposed in this paper.

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基于电流正反馈控制的三相四腿逆变器

电网的电能质量受到非对称负荷数量增加的影响。近年来，在三相三桥逆变器基础上加桥的三相四腿逆变器因其结构紧凑、体积小、效率高等优点而受到研究。三相四腿逆变器随后为电力系统注入了活力，具有广阔的应用前景，但其控制方法变得比以往复杂得多，难以实现。因此，本文提出了一种基于电流正反馈控制和三维空间矢量调制(SVM)的新型控制方法。通过对四腿逆变系统的分析，引入了三相电压反馈控制的三相不平衡电流。此外，通过正反馈增加了不平衡量，从而更快、更准确地控制三相输出电压的平衡。仿真结果表明了该方法的可行性和有效性。

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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2016 International Conference on Integrated Circuits and Microsystems (ICICM)

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