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A Two State Feedback Active Damping Strategy for the LCL Filter Resonance in Grid-Connected Converters
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  • Journal title : Journal of Power Electronics
  • Volume 16, Issue 4,  2016, pp.1587-1597
  • Publisher : The Korean Institute of Power Electronics
  • DOI : 10.6113/JPE.2016.16.4.1587
 Title & Authors
A Two State Feedback Active Damping Strategy for the LCL Filter Resonance in Grid-Connected Converters
Gaafar, Mahmoud A.; Ahmed, Emad M.; Shoyama, Masahito;
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 Abstract
A novel active damping strategy for the LCL filter resonance is proposed using the grid current and the capacitor voltage. The proposed technique is deduced in the continuous time domain and a discussion for its discrete implementation is presented. According to the proposed technique, instability of the open loop system, which results in non-minimum phase behavior, can be avoided over wide range of resonant frequencies. Moreover, straightforward co-design steps for both the fundamental current regulator and the active damping loops can be used. A numerical example along with experimental results are introduced to validate the proposed strategy performance over wide range of resonant frequencies.
 Keywords
LCL filter;active damping;resonance;converters;grid;
 Language
English
 Cited by
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