Untitled Document
 
Untitled Document
 
You may need to enable or update / install Adobe Flash Player Plug-in to display JPE e-Book in your device properly. If you use Google Chrome, please find information here
> Archives > Current Issues
JPE, Vol. 18, No. 4, July 2018
New Design Approach for Grid-Current-Based Active Damping of LCL Filter Resonance in Grid-Connected Converters
Mahmoud A. Gaafar, Gamal M. Dousoky, Emad M. Ahmed, Masahito Shoyama, and Mohamed Orabi
Area Analysis, Modeling and Control
Abstract This paper investigates the active damping of grid-connected LCL filter resonance using high-pass filter (HPF) of the grid current. An expression for such HPF is derived in terms of the filter components. This expression facilitates a general study of the actively damped filter behavior in the discrete time domain. Limits for the HPF parameters are derived to avoid the excitation of unstable open loop poles since such excitation can reduce both the damping performance and the system robustness. Based on this study, straightforward co-design steps for the active damping loop along with the fundamental current regulator are proposed. A numerical example along with simulation and experimental results are presented to verify the theoretical analyses.
Keyword Active damping,Grid,LCL filter,Resonance
PDF
Untitled Document