Sequence-Decoupled Resonant Controller for Three-phase Grid-connected Inverters

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition Pub Date : 2009-03-21 DOI:10.1109/APEC.2009.4802643

Fei Wang, M. C. Benhabib, J. Duarte, M. Hendrix

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引用次数: 23

Abstract

This paper proposes a set of sequence-decoupled resonant controllers constructed with an easy-to-implement structure. It shows that either positive-sequence or negative-sequence components of three-phase unbalanced AC signals can be regulated individually in the stationary frame, while conventional and widely used resonant controllers cannot separately cope with these two sequences. Consequently, the extraction of the corresponding sequence component is not necessary for an individual sequence's control. Moreover, controllers designed for positive and negative sequences can be assigned with different gains to meet practical applications. The principle of new sequence-decoupled resonant controllers is described based on a multi-state-variable structure. In addition, the relation with conventional resonant controllers is investigated. The controllers are found to be equivalent when dealing with both sequences together. Furthermore, two examples are presented to show the application of the proposed controller. The effectiveness of the proposed new controller and its performance in the two system applications are verified by experiments.

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三相并网逆变器的顺序解耦谐振控制器

本文提出了一套易于实现的序列解耦谐振控制器。结果表明，三相不平衡交流信号的正序分量和负序分量都可以在固定框架内单独调节，而传统的和广泛使用的谐振控制器不能单独处理这两个序列。因此，相应序列成分的提取对于单个序列的控制是不必要的。此外，针对正序列和负序列设计的控制器可以分配不同的增益以满足实际应用。介绍了一种基于多状态变量结构的新型序列解耦谐振控制器的工作原理。此外，还研究了与传统谐振控制器的关系。当同时处理两个序列时，发现控制器是等效的。最后，通过两个实例说明了所提控制器的应用。通过实验验证了所提控制器的有效性及其在两种系统应用中的性能。

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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2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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