Control of Grid Connected Modular Multilevel Converter

  • Vojtech Blahnik University of West Bohemia
  • Tomas Kosan University of West Bohemia
  • Jakub Talla University of West Bohemia

Abstract

This paper describes the control of multilevel voltage source active rectifier connected directly to ac grid. The proposed topology of multilevel converter is composed of three cascaded H-bridge converters (CHB), thus in this case seven level converter. Designed control algorithm provides direct current control in each phase even under unbalanced load. The main attention is paid to voltage balancing of the individual power cells (H-bridge). The voltage balancing algorithm is designed separately for each power cell. The paper presents simulation and experimental results of designed low-voltage laboratory prototype with rated power of 10 kW.

 

DOI: http://dx.doi.org/10.5755/j01.eee.21.4.12777

Published
2015-07-28
Section
ELECTRONICS