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http://dx.doi.org/10.6113/JPE.2015.15.3.786

Active Damping of LLCL Filters Using PR Control for Grid-Connected Three-Level T-Type Converters  

Alemi, Payam (Department of Electrical Engineering, Yeungnam University)
Jeong, Seon-Yeong (Department of Electrical Engineering, Yeungnam University)
Lee, Dong-Choon (Department of Electrical Engineering, Yeungnam University)
Publication Information
Journal of Power Electronics / v.15, no.3, 2015 , pp. 786-795 More about this Journal
Abstract
In this paper, an active damping control scheme for LLCL filters based on the PR (proportional-resonant) regulator is proposed for grid-connected three-level T-type PWM converter systems. The PR controller gives an infinite gain at the resonance frequency. As a result, the oscillation can be suppressed at that frequency. In order to improve the stability of the system in the case of grid impedance variations, online grid impedance estimation is applied. Simulation and experimental results have verified the effectiveness of the proposed scheme for three-phase T-type AC/DC PWM converters.
Keywords
Active damping; Grid-connected converter; LLCL filters; PR control;
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Times Cited By KSCI : 4  (Citation Analysis)
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