Stability analysis of CHB photovoltaic grid-connected inverter in weak grid

被引：0
|
作者：
Yang, Siwei [1 ,2 ]
Zhang, Xing [1 ,2 ]
Mao, Wang [1 ,2 ]
Hu, Yuhua [1 ,2 ]
Wang, Mingda [1 ,2 ]
Wang, Fusheng [1 ,2 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei,230009, China
[2] National and Local Joint Engineering Laboratory for Renewable Energy Access to Grid Technology, Hefei University of Technology, Hefei,230009, China
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2022年 / 43卷 / 01期
关键词：
D O I：
10.19912/j.0254-0096.tynxb.2020-0203
中图分类号：
学科分类号：
摘要：
With the access of large-scale new energy power generation equipment, a weak grid may be formed, which will affect the stability of the inverter system. Aiming at the cascaded grid-connected systems considering the effects of PLL and voltage feedforward, the output impedance is modeled. The effects of time delay, bandwidth of phase-locked loop, coefficient of resonance feedforward on the stability of the grid-connected system is analyzed based on the impedance stability criterion. Finally, a phase compensation method is used to improve the stability of the cascaded H-bridge grid connected inverter under weak grid. Simulation and experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed method. © 2022, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：398 / 405
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