Phase-angle compensation control of LCL-type grid-connected inverter based on impendance analysis

被引：0
|
作者：
Yang, Xingwu [1 ]
Wang, Nannan [1 ]
Wang, Yi [2 ]
Zhou, Bin [2 ]
机构：
[1] Engineering Research Center of Green Energy Grid-Connected Technology, Shanghai University of Electric Power, Shanghai,200090, China
[2] Shanghai Donghai Wind Power Co., Ltd., Shanghai,200090, China
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2020年 / 41卷 / 05期
关键词：
Stability criteria - Electric inverters;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In a weak grid system, grid impedance variations will increase harmonic current of the grid-connected inverter, even system stability will be significantly influenced. This paper establishes the impedance model, the impedance stability criterion is used to analyze the stability of weak grid system with LCL inverter under traditional current control. A phase angle compensation control strategy with capacitor current feedback is proposed, then the phase angle of output impedance of the system is increased, it will improve the stability of grid-connected inverter under weak grid. The simulation results show that the proposed method can effectively solve the instability caused by high grid impedance, the system has good steady-state performance and rapid dynamic response. © 2020, Editorial Board of Acta Energiae Solaris Sinica. All right reserved.
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页码：312 / 318
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