Energy and director switches commutation controls for the alternate arm converter

Pierre Vermeersch*, François Gruson, Xavier Guillaud, Michael M.C. Merlin, Philippe Egrot

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The Alternate Arm Converter (AAC) is a promising multilevel Voltage Source Converter (VSC) suitable for High Voltage Direct Current (HVDC) transmission systems. This converter exhibits interesting features such as a DC Fault Ride Through capability thanks to the use of Full-Bridge Sub-Modules (SM) and a smaller footprint than an equivalent Modular Multilevel Converter (MMC). After an analysis of the converter operating modes called Non-overlap and Overlap mode, a sequential representation of the AAC operation is proposed. The main originality of this paper is the use of the Petri Net to describe all the phases and to highlight their sequencing. According to the phases identified thanks to the sequential approach, models and control structures for the grid currents, the internal energy and the Zero Current Switching (ZCS) are detailed. Furthermore, the step-by-step approach proposed in this paper allows a clear and rigorous modelling of this complex converter.

Original languageEnglish
Pages (from-to)490-505
Number of pages16
JournalMathematics and Computers in Simulation
Early online date6 Dec 2018
Publication statusPublished - 1 Apr 2019
Event12th International Conference on Modeling and Simulation of Electric Machines, Converters and Systems (ELECTRIMACS) - Toulouse, France
Duration: 4 Jul 20176 Jul 2017


  • Control
  • High voltage direct current
  • Multilevel converters
  • Voltage source converter


Dive into the research topics of 'Energy and director switches commutation controls for the alternate arm converter'. Together they form a unique fingerprint.

Cite this