Proportional Dual-resonant Controllers Applied in Three-phase Grid-connected Inverters

被引：0
|
作者：
Liu, Hong [1 ]
Zhang, Xiaozhong [1 ]
Li, Yun [1 ]
机构：
[1] Zhejiang Eifesun Energy Technology Company Limited, Wenzhou, 325000, Zhejiang Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2015年 / 35卷 / 08期
关键词：
Current control; Grid-connected inverters; Proportional dual- resonant (PDR); Proportional resonant;
D O I：
10.13334/j.0258-8013.pcsee.2015.08.024
中图分类号：
学科分类号：
摘要：
As the current loop is the core of the control system for grid-connected inverters, improving its performance is very important. This paper proposed a controller named as proportional dual-resonant (PDR) for three-phase grid- connected inverters. As an improvement of the classical proportional resonant (PR) controller, this controller was also implemented in the two-phase stationary frame. Its two resonant items called as positive-sequence and negative- sequence resonance were realized by two second order discrete state equations with an anticlockwise and clockwise rotation matrix respectively. This discretization technique avoids displacements of the resonant poles and phases from expected values which are usually caused by other existing ones such as bilinear transformation. Therefore, the proposed PDR controller has the characteristics of no static difference, low total harmonic distortion, and strong grid adaptability. Contrast experiment shows that the proposed algorithm has high performance. © 2015 Chin. Soc. for Elec. Eng.
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页码：2026 / 2032
页数：6
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