Analysis of the Power Balance in the Cells of a Multilevel Cascaded H-Bridge Converter

Author

Vazquez, Sergio ; Leon, Jose I. ; Carrasco, Juan M. ; Franquelo, Leopoldo G. ; Galvan, Eduardo ; Reyes, Manuel ; Sanchez, Juan A. ; Dominguez, Eugenio

Author_Institution

Dept. of Electron. Eng., Univ. of Seville, Seville, Spain

Volume

57

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

2287

Lastpage

2296

Abstract

Multilevel cascaded H-bridge (CHB) converters have been presented as a good solution for high-power applications. In this way, several control and modulation techniques have been proposed for this power converter topology. In this paper, the steady-state power balance in the cells of a single-phase two-cell CHB is studied. The capability to be supplied with active power from the grid or to deliver active power to the grid in each cell is analyzed according to the dc-link voltages and the desired ac output voltage value. The limits of the maximum and minimum input active powers for a stable operation of the CHB are addressed. Simulation results are shown to validate the presented analysis.

Keywords

bridge circuits; power convertors; dc-link voltages; high-power applications; modulation techniques; multilevel cascaded H-bridge converter; power balance analysis; power converter topology; single-phase two-cell CHB; Cascaded converters; multilevel systems;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2009.2034679

Filename

5290141