On the Explicit Relation between Mains-Side Current THD and DC Link Voltage Controller Gain in Grid-Connected Converters

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

It is known that attainable DC link voltage loop bandwidth in grid-connected converters is limited due to trade-off with AC-side current total harmonic distortion (THD). The letter reveals that THD requirement inflicts the value of DC link voltage controller gain only at double-grid frequency. On the other hand, the desired phase margin poses another restriction on the controller performance. As a result, if a typical PI compensator is employed, two abovementioned performance merits impose DC link voltage loop dynamics. The letter concludes that dynamic performance may be improved without deteriorating grid-side current quality by adding a degree-of-freedom to compensator structure so that the loop gain magnitude at double-grid frequency and the crossover frequency are decoupled. Experimental results validate the revealed findings.

Original languageEnglish
Title of host publicationINES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings
PublisherInstitute of Electrical and Electronics Engineers
Pages69-72
Number of pages4
ISBN (Electronic)9781665492096
DOIs
StatePublished - 1 Jan 2022
Event26th IEEE International Conference on Intelligent Engineering Systems, INES 2022 - Crete, Greece
Duration: 12 Aug 202215 Aug 2022

Publication series

NameINES 2022 - 26th IEEE International Conference on Intelligent Engineering Systems 2022, Proceedings

Conference

Conference26th IEEE International Conference on Intelligent Engineering Systems, INES 2022
Country/TerritoryGreece
CityCrete
Period12/08/2215/08/22

Keywords

  • Grid-connected converters
  • THD
  • loop gain

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Artificial Intelligence
  • Computer Science Applications
  • Biomedical Engineering

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