Fast voltage stabilization control of split DC bus midpoint in 3P4W shunt APFs

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Abstract

A midpoint voltage balancer (MVB) based on dual-switching-leg is proposed in this paper. The MVB provides fast voltage stabilization of the midpoint in three-phase four-wire (3P4W) shunt active power filters (APFs). Interleaved control is adopted in the MVB to prevent high-frequency current circulation in split capacitors, and to facilitate an accurate neutral current tracking. All switches of the MVB operate in zero-voltage switching (ZVS) mode when the neutral current is smaller than the nominal phase current of the APF. MATLAB simulation is carried out to verify the effectiveness of the MVB. A 20 kVA prototype has been built, and experimental results show that the voltage ripple of the midpoint is maintained within 1.5% of the total dc bus voltage even under severe neutral current transient.
Original languageEnglish
Title of host publication21st European Conference on Power Electronics and Applications (EPE'19 ECCE Europe)
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages10
ISBN (Electronic)978-9-0758-1531-3
DOIs
Publication statusPublished - 6 Sep 2019
Event21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe - Via Magazzini del Cotone, Genova, Italy
Duration: 3 Sep 20195 Sep 2019
Conference number: 21
http://epe-ecce-conferences.com/epe2019/

Conference

Conference21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe
Abbreviated titleEPE2019ECCE
Country/TerritoryItaly
CityGenova
Period3/09/195/09/19
Internet address

Keywords

  • Active filter
  • Three-phase system
  • Power quality
  • Interleaved converters

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