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Large Signal Stability Analysis and Stabilization of Converters Connected to Grid Through $LCL$ Filters

【摘要】This paper develops a robust tool for handling ac side stability issues occurring in $LCL$-filter-based grid-connected converters. $LCL$ filters give advantages in cost and dynamic as smaller inductors employed compared with $L$ filters for the same required damping of the switching harmonics. Nevertheless, the additional poles introduced by the $LC$ part induce resonance in the system leading to stability problems. To deal with this stability issue, a new damping method based on the generalized circle criterion is proposed in this paper. The large signal nature of the applied theory allows obtaining high damping efficiency and robustness under large variations of the grid impedance. A theoretical analysis and the experimental results are presented to show the effectiveness of the proposed compensating method.

【期刊名称】 Industrial Electronics, IEEE Transactions on

【作者】Houari, A.;Renaudineau, H.;Nahid-Mobarakeh, B.;Martin, J.;Pierfederici, S.;Meibody-Tabar, F.;

【作者单位】;

【收录信息】;

【年(卷),期】2014(61),12

【年度】2014

【页码】6507-6516

【总页数】10

【原文格式】PDF

【正文语种】eng

【中图分类】;

【关键词】Damping; Filtering algorithms; Filtering theory; Power harmonic filters; Power system stability; Stability criteria; $LCL$ filter; Absolute stability; large signal stability; voltage-source converter (VSC);

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