Paper Info
Title
Generalized Harmonic Control for CHB Converters with Unbalanced Cells Operation
Abstract
Multilevel cascaded H-bridge (CHB) converters are an attractive solution for multiple applications like flexible ac transmission systems and solid-state smart transformers, among others. This article is focused on a CHB working with unbalanced conditions per cell (different cell dc voltages and/or cell voltage references). In this scenario, the phase-shifted pulsewidth modulation (PS-PWM) technique produces a harmonic distortion around twice the carrier frequency and its multiples in the CHB output voltage. In this article, a generalized variable-angle PS-PWM method is presented in order to mitigate this drawback improving the CHB output voltage harmonic spectrum. The proposed method is based on applying a mathematical search algorithm to determine the phase displacement angles to be applied to the PS-PWM technique. Experimental results show how this objective is achieved without introducing any disadvantage in the CHB operation. The method can be applied to CHB with any number of cells.
Year
DOI
Venue
2020
10.1109/TIE.2019.2956383
IEEE Transactions on Industrial Electronics
Keywords
DocType
Volume
Harmonic analysis,Pulse width modulation,Topology,Harmonic distortion,Frequency modulation,Switches
Journal
67
Issue
ISSN
Citations 
11
0278-0046
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Abraham Marquez Alcaide100.34
Jose I. Leon243044.77
Vito Giuseppe Monopoli3428.85
Sergio Vazquez454952.78
Marco Liserre535765.71
Leopoldo G. Franquelo655256.44