NDLI: A composite passive damping method of the LLCL-filter based grid-tied inverter

Content Provider	IEEE Xplore Digital Library
Author	Weimin Wu Min Huang Yunjie Sun Xiongfei Wang Blaabjerg, F.
Copyright Year	2012
Description	Author affiliation: Dept. of Energy Engineering, Aalborg University, Aalborg, Denmark (Xiongfei Wang; Blaabjerg, F.) \|\| Dept. of Electrical Engineering, Shanghai Maritime University, Shanghai, China (Weimin Wu; Min Huang; Yunjie Sun)
Abstract	This paper investigates the maximum and the minimum gain of the proportional resonant based grid current controller for a grid-tied inverter with a passive damped high-order power filter. It is found that the choice of the controller gain is limited to the local maximum amplitude determined by Q-factor around the characteristic frequency of the filter and grid impedance. To obtain the Q-factor of a high-order system, an equivalent circuit analysis method is proposed and illustrated through several classical passive damped LCL- and LLCL-filters. It is shown that both the RC parallel damper that is in parallel with the capacitor of the LCL-filter or with the Lf-Cf resonant circuit of the LLCL-filter, and the RL series damper in series with the grid-side inductor have their own application limits. Thus, a composite passive damped LLCL-filter for the grid-tied inverter is proposed, which can effectively suppress the possible resonance in case that the grid impedance varies in a wide range. Simulation results are good agreement with the theoretical analysis.
Starting Page	759
Ending Page	766
File Size	405297
Page Count	8
File Format	PDF
ISBN	9781467320214
e-ISBN	9781467320238
e-ISBN	9781467320221
DOI	10.1109/PEDG.2012.6254087
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-25
Publisher Place	Denmark
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Damping Resistors Power filters Passive damping Q factor Compositie Inverters LLCL-filter Gain Power harmonic filters Grid-tied
Content Type	Text
Resource Type	Article

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