Low switching frequency modulation strategies with low impact on the mains, suitable for a for a large power voltage sourced converter that employs reduced VA-rating coupling magnetic elements

F. J. Chivite-Zabalza, M. A. Rodriguez, P. Izurza, G. Calvo, D. Madariaga, I. Larrazabal

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

1 Scopus citations

Abstract

This paper presents a review of modulation strategies that can be applied on a novel large power voltage source converter arrangement. This arrangement employs four three-level, three-phase neutral-point-clamped inverters, combined by means of low volt-ampere rating intermediate magnetic elements. The 12 resulting inverter poles are paralleled up in pairs by using six interphase transformers (IPTs), and their outputs are connected in series by using a simple openwye/ delta transformer, rated to 50% of the power throughput. Due to the inherent harmonic cancelation provided, the converter is suited for the use of various low-switching frequency modulation strategies. In this paper full, wave modulation and three different Selective Harmonic Elimination strategies are described, all obtaining a clean output waveform, in some cases comparable to that of a 48-pulse converter. The converter components and its operation are explained, and experimental results are provided.

Original languageEnglish
Title of host publication10th IET International Conference on AC and DC Power Transmission, ACDC 2012
Edition610 CP
DOIs
StatePublished - 2012
Externally publishedYes
Event10th IET International Conference on AC and DC Power Transmission, ACDC 2012 - Birmingham, United Kingdom
Duration: Dec 4 2012Dec 5 2012

Publication series

NameIET Conference Publications
Number610 CP
Volume2012

Conference

Conference10th IET International Conference on AC and DC Power Transmission, ACDC 2012
Country/TerritoryUnited Kingdom
CityBirmingham
Period12/4/1212/5/12

Keywords

  • Flexible AC transmission systems (FACTS)
  • Insulated gate bipolar transistor (IGBT)
  • Interphase transformer (IPT)
  • Selective harmonic elimination (SHE)

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