Generalized direct power control for grid connected multilevel converters

Conference paper (2010)

Authors

Sebastian Rivera Universidad Técnica Federico Santa María
Samir Kouro Toronto Metropolitan University
Patricio Cortes Universidad Técnica Federico Santa María
Salvador Alepuz Universitat Politecnica de Catalunya
Mariusz Malinowski Warsaw University of Technology
Bin Wu Toronto Metropolitan University
Jose Rodriguez Universidad Técnica Federico Santa María
Affiliation
External organisation
Grid connection Multilevel converters Direct power control
More Info
expand_more

Published Date

2010

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Affiliation

External organisation

Abstract

This paper presents a generalized direct power control (DPC) scheme for grid connected multilevel converters. The proposed method extends the original DPC operating principle by considering only for selection the closest vectors to the present switching state. This approach requires the power derivatives for feedback, which can present numerical implementation problems in real time. Therefore a grid virtual flux based observer is proposed to overcome this issue. The proposed method is applicable to any multilevel converter topology of any number of levels. In this paper simulations results are presented for a 9 level cascaded H-bridge converter. The proposed solution enables DPC for multilevel converters used in medium voltage applications while improving overall power quality and efficiency of the system.