LCL type three-phase photovoltaic grid-connected inverter under week grid conditions

被引：0
|
作者：
Fu Z. [1 ]
Zhang Z. [1 ]
Dong Y. [1 ]
机构：
[1] College of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 04期
关键词：
Gird-connected inverter; LCL filter; Photovoltaic generation; Stability analysis; Weak grid;
D O I：
10.19912/j.0254-0096.tynxb.2018-1215
中图分类号：
O144 [集合论]; O157 [组合数学（组合学）];
学科分类号：
070104 ;
摘要：
Conventional grid-connected inverters are prone to instability in a weak grid environment. A double-closed loop control strategy for grid-side current-LCL filter capacitor voltage is designed considering the impedance variation of the grid. Based on the LCL-type photovoltaic grid-connected inverter topology, a mathematical model is established in the dq synchronous rotating coordinate system to perform decoupling and controller design. The influence of grid impedance variation on LCL filter is analyzed. A system parameter design method considering phase-locked loop disturbance under different grid impedance conditions is presented. Finally, the correctness and feasibility of the theoretical derivation and the stability and robustness of the three-phase photovoltaic grid-connected inverter system are verified by simulation. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
收藏
页码：193 / 199
页数：6
相关论文
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