Asymmetric overlap and hysteresis current control of zero-current switched alternate arm converter

Harith R. Wickramasinghe, Georgios Konstantinou, Josep Pou, Vassilios Agelidis

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The alternate arm converter (AAC) is a multilevel converter of the same family as the modular multilevel converter (MMC). Contrary to the MMC, the AAC offers dc-fault tolerant capabilities but requires complex submodule (SM) capacitor voltage/energy regulation and circulating current control. Such control is also limited due to the small overlap period where both arms conduct and energy between the arms can be exchanged. This paper develops a double-band hysteresis-based circulating current control strategy by introducing an asymmetric overlap period control of the director switches (DSs). The proposed controller ensures zero-current switching operation of the DSs, and increases the flexibility of SM capacitor voltage regulation owing to the asymmetric overlap period. It improves the performance of current control and energy regulation for the AAC at both near sweet-spot and non sweet-spot operation without disturbing the output voltages and currents. The performance and effectiveness of the proposed controller are illustrated through simulations on MATLAB-Simulink and PLECS.
Original languageEnglish
Title of host publicationProceedings of the Annual Conference of the Ieee Industrial Electronics Society
Number of pages6
PublisherIEEE
Publication date2016
Pages2526-2531
DOIs
Publication statusPublished - 2016
Event42nd Annual Conference of the IEEE Industrial Electronics Society - Palazzo dei Congressi Piazza Adua, Florence, Italy
Duration: 23 Oct 201626 Oct 2016

Conference

Conference42nd Annual Conference of the IEEE Industrial Electronics Society
LocationPalazzo dei Congressi Piazza Adua
CountryItaly
CityFlorence
Period23/10/201626/10/2016

Keywords

  • Alternate arm converter
  • Asymmetric overlap period
  • Multilevel converters
  • Zero-current switching

Cite this

Wickramasinghe, H. R., Konstantinou, G., Pou, J., & Agelidis, V. (2016). Asymmetric overlap and hysteresis current control of zero-current switched alternate arm converter. In Proceedings of the Annual Conference of the Ieee Industrial Electronics Society (pp. 2526-2531). IEEE. https://doi.org/10.1109/IECON.2016.7793990