Active Damping Method Based on State-Feedback for Grid-Connected Inverter with LCL Filter

被引：0
|
作者：
Zhang Q. [1 ,2 ]
Li R. [1 ]
Zhang Y. [1 ]
Ren B. [1 ]
Sun X. [1 ,2 ]
机构：
[1] Department of Electric Engineering, Xi'an University of Technology, Xi'an
[2] Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing, Xi'an University of Technology, Xi'an
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 08期
关键词：
LCL filter-based grid-connected inverter; Stability problem; State reconstruction; State-feedback;
D O I：
10.19595/j.cnki.1000-6753.tces.L80473
中图分类号：
学科分类号：
摘要：
Based on discrete state space model analysis for LCL grid-connected inverter, an active damping method is proposed to settle down the stability problems caused by the grid impedance variation and the digital time delay. The common coupling point voltage vpcc is used as a system state, and its feedback characteristics is studied to reveal its damping effect. In addition, the states feedback characteristics of inverter current ii and grid current ig are evaluated respectively. Consequently, a state reconstruction method is provided, which relies on the sampling values of vpcc and ig. Meanwhile, the order of the space model is virtually enlarged to improve the system stability. The feasibility and effectiveness of the proposed control method are verified by Matlab/Simulink simulations and experiments. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：1698 / 1707
页数：9
相关论文
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