Design of LCL filter for improving robustness of grid-connected voltage source inverter

In this paper, a design method of the LCL filter for the robustness of grid-connected voltage source inverter (VSI) is proposed in the case of the grid-side current feedback control. A stable region is investigated for the robust operation of VSI with regard to stability margins without a passive or...

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Bibliographic Details
Main Authors: Dongsul Shin, Hee-Je Kim, Jong-Pil Lee, Tae-Jin Kim, Dong-Wook Yoo
Format: Conference Proceeding
Language:English
Subjects:
Harmonic analysis
Impedance
Inductance
Power harmonic filters
Power system stability
Resonant frequency
Stability analysis
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Summary:In this paper, a design method of the LCL filter for the robustness of grid-connected voltage source inverter (VSI) is proposed in the case of the grid-side current feedback control. A stable region is investigated for the robust operation of VSI with regard to stability margins without a passive or an active damping. The proposed design method presents a means to place the resonance frequency in a proposed stable region, and considers the harmonic currents injected into the grid. Also, the grid impedance is considered for the system stability. The inverter-side inductance and the filter capacitance performs an important role in the proposed design method. A grid-connected VSI with filter parameters designed by the proposed design method is experimentally verified.
ISSN:2329-3721
2329-3748
DOI:10.1109/ECCE.2014.6953798