Estimation of an unbalanced grid impedance using a three-phase power converter

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Abstract

This paper proposes a real-time method for estimating an unbalanced grid impedance using a three-phase converter. In the method, a periodic single-frequency or multi-frequency excitation signal is added to the converter voltage reference. The converter measures currents and voltages at the point of common coupling. The impedance estimate is obtained from the measurements using sliding discrete Fourier transform (SDFT). The method is experimentally validated.
Original languageEnglish
Title of host publicationProceedings of the 22nd European Conference on Power Electronics and Applications, EPE’20 ECCE Europe
PublisherIEEE
Number of pages10
ISBN (Electronic)9789075815368
DOIs
Publication statusPublished - 7 Sep 2020
MoE publication typeA4 Article in a conference publication
EventEuropean Conference on Power Electronics and Applications - Virtual, Online
Duration: 7 Sep 202011 Sep 2020
Conference number: 22

Publication series

NameEuropean Conference on Power Electronics and Applications
PublisherIEEE
ISSN (Print)2325-0313

Conference

ConferenceEuropean Conference on Power Electronics and Applications
Abbreviated titleEPE-ECCE Europe
CityVirtual, Online
Period07/09/202011/09/2020
OtherVirtual conference

Keywords

  • Converter control
  • Estimation technique
  • Impedance measurement
  • Three-phase system

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