Resonance damping method of single-phase inverter with LCL-filter based on error signal feedback

被引：0
作者：
Wan X.-F. [1 ]
Nie X.-Y. [1 ]
Liao Z.-P. [1 ]
Ding X.-H. [1 ]
Zeng F.-P. [2 ]
机构：
[1] Information Engineering School, Nanchang University, Nanchang
[2] Jiangsu Lin Yang Energy Co.,Ltd, Qidong
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2018年 / 22卷 / 05期
关键词：
Error feedback; Grid voltage feed-forward; LCL filter; Resonance suppression;
D O I：
10.15938/j.emc.2018.05.013
中图分类号：
学科分类号：
摘要：
LCL filter has a significant attenuation effect on high frequency harmonics contained in the output current of the inverter, but its own third-order resonance characteristics easily affect the stability of the system. To solve this problem, an error signal feedback control method was proposed on the basis of the traditional current feedback control method and grid voltage feed-forward control strategy for LCL-type inverter. Firstly, the output current when the resonant peak of LCL filter has been suppressed was estimated based on the fact that LCL filter has the same frequency characteristics with L filter in low frequency range, and then the difference between the actual current and the estimated value was fed back to suppress resonance. The influence of the method on the stability of the system was analyzed, and the parameter design method was provided. Finally, the simulation and experimental results verify effectiveness of the proposed control strategy. © 2018, Harbin University of Science and Technology Publication. All right reserved.
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页码：102 / 109
页数：7
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