D-Decomposition Based Robust Discrete-Time Current Regulator for Grid-Connected VSI

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Abstract

The D-decomposition method allows to design control structures with prescribed locations of closed loop poles. Unlike the root locus method, D-decomposition natively handles two variable regulator parameters, which makes it suitable for more complex control structures. Moreover, an extension to more than two variable parameters is straightforward. In this paper, the advantages of the D-decomposition method are illustrated by synthesizing a robust low-order current regulator for a grid-connected voltage source inverter (VSI) with LCL filter. It is shown how to visualize the complete region in the low dimensional regulator parameter space satisfying certain robust performance criteria (with robust stability being a special case). The paper concludes by simulation results validating the robustness properties of the designed low-order regulator under substantial grid impedance variations.
Original languageEnglish
Title of host publication29th IEEE International Symposium on Industrial Electronics
Subtitle of host publication17-19 June 2020, online conference hosted in Delft, The Netherlands
PublisherIEEE
Pages100-107
Number of pages8
ISBN (Electronic)9781728156354
DOIs
Publication statusPublished - 2020
Event29th IEEE International Symposium on Industrial Electronics - Delft, Netherlands
Duration: 17 Jun 202019 Jun 2020
http://isie2020.org/index.php

Conference

Conference29th IEEE International Symposium on Industrial Electronics
Abbreviated titleISIE 2020
CountryNetherlands
CityDelft
Period17/06/2019/06/20
OtherVirtual/online event due to COVID-19
Internet address

Keywords

  • Current control
  • D-decomposition
  • LCL-filter
  • robust performance
  • robust stability

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