Analysis of the Passive Damping Losses in LCL-Filter-Based Grid Converters

被引:494
作者
Pena-Alzola, Rafael [1 ]
Liserre, Marco [1 ]
Blaabjerg, Frede [1 ]
Sebastian, Rafael [2 ]
Dannehl, Jorg [3 ]
Fuchs, Friedrich Wilhelm [4 ]
机构
[1] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark
[2] Natl Univ Distance Learning UNED, Dept Elect Elect & Control Engn, Madrid 28040, Spain
[3] Danfoss Solar Inverters, DK-6400 Sonderborg, Denmark
[4] Univ Kiel, Inst Power Elect & Elect Drives, D-24143 Kiel, Germany
关键词
LCL-filter; passive damping; stability; voltage-source converter; DESIGN;
D O I
10.1109/TPEL.2012.2222931
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Passive damping is the most adopted method to guarantee the stability of LCL-filter-based grid converters. The method is simple and, if the switching and sampling frequencies are sufficiently high, the damping losses are negligible. This letter proposes the tuning of different passive damping methods and an analytical estimation of the damping losses allowing the choice of the minimum resistor value resulting in a stable current control and not compromising the LCL-filter effectiveness. Stability, including variations in the grid inductance, is studied through root locus analysis in the z-plane. The analysis is validated both with simulation and with experiments.
引用
收藏
页码:2642 / 2646
页数:5
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