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


Vol. 15, No. 3, pp. 786-795, May  2015
10.6113/JPE.2015.15.4.786


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 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.


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Cite this article

[IEEE Style]

P. Alemi, S. Jeong and D. Lee, "Active Damping of LLCL Filters Using PR Control for Grid-Connected Three-Level T-Type Converters," Journal of Power Electronics, vol. 15, no. 3, pp. 786-795, 2015. DOI: 10.6113/JPE.2015.15.4.786.

[ACM Style]

Payam Alemi, Seon-Yeong Jeong, and Dong-Choon Lee. 2015. Active Damping of LLCL Filters Using PR Control for Grid-Connected Three-Level T-Type Converters. Journal of Power Electronics, 15, 3, (2015), 786-795. DOI: 10.6113/JPE.2015.15.4.786.