Low-frequency voltage ripples in the flying capacitors of the nested neutral-point-clamped converter

Amer M.Y.M. Ghias, Josep Pou, Salvador Ceballos, Vassilios G. Agelidis

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

9 Citations (Scopus)

Abstract

The flying capacitors (FCs) of the nested neutral-point-clamped (NNPC) converter show an inherent voltage ripple at fundamental frequency. This ripple can be significantly large under some operating conditions of the converter. In this paper, the amplitudes of the low-frequency voltage ripples in the FCs are determined. An averaged model of the NNPC converter is introduced and used in the analysis. The amplitudes of the capacitor voltage ripples are provided using normalized variables so that this information can be used to size the FCs of the converter in different applications. The results of the analysis are validated experimentally in a laboratory prototype.

Original languageEnglish
Title of host publication2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages236-240
Number of pages5
ISBN (Electronic)9781467383936
DOIs
Publication statusPublished - 10 May 2016
Event31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 - Long Beach, United States
Duration: 20 Mar 201624 Mar 2016

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2016-May

Conference

Conference31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016
Country/TerritoryUnited States
CityLong Beach
Period20/03/1624/03/16

Keywords

  • Capacitors
  • Switches
  • Mathematical model
  • Topology
  • Voltage control
  • Cost function
  • Integrated circuits

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