A two state feedback active damping strategy for the LCL filter resonance in grid-connected converters

Mahmoud A. Gaafar, Emad M. Ahmed, Masahito Shoyama

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)1587-1597
Number of pages11
JournalJournal of Power Electronics
Volume16
Issue number4
DOIs
Publication statusPublished - Jul 1 2016

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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