Impedance Based Analysis and Design of Harmonic Resonant Controller for a Wide Range of Grid Impedance

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Abstract

This paper investigates the effect of grid impedance variation on harmonic resonant current controllers for gridconnected voltage source converters by means of impedance-based analysis. It reveals that the negative harmonic resistances tend to be derived from harmonic resonant controllers in the closed-loop output admittance of converter. Such negative resistances may interact with the grid impedance resulting in steady state error or unstable harmonic compensation. To deal with this problem, a design guideline for harmonic resonant controllers under a wide range of grid impedance is proposed, where the controller gain boundary region is derived based on the short circuit ratio. The nonlinear time domain simulations are presented to verify the theoretical analysis in the frequency domain, and the experimental results based on the analysis results are included.
Original languageEnglish
Title of host publicationProceedings of the 5th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2014
Number of pages8
PublisherIEEE Press
Publication dateJun 2014
Pages1-8
ISBN (Print)978-1-4799-5115-4
DOIs
Publication statusPublished - Jun 2014
Event5th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2014 - Galway, Ireland
Duration: 24 Jun 201427 Jun 2014
Conference number: 5
http://www.pedg2014.org/

Conference

Conference5th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2014
Number5
CountryIreland
CityGalway
Period24/06/201427/06/2014
Internet address

Keywords

  • P+Resonant current controller
  • Power quality
  • Grid-connected inverters
  • Harmonic compensation
  • Grid impedance

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