Analysis and operation of modular multilevel converters with phase-shifted carrier PWM
2013 (English)In: 2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013, IEEE , 2013, 396-403 p.Conference paper (Refereed)
The modular multilevel converter is a suitable topology for high-voltage high-power applications since the cascaded submodules can generate high-voltage waveforms with excellent harmonic performance at low switching frequencies. Many publications have been presented on the modulation and control of this converter type, some of which are based on phase-shifted carrier modulation. This paper presents an analysis of how the switching frequency affects the capacitor voltages, circulating current and alternating voltage at phase-shifted carrier modulation. It is found that integer multiples of the fundamental frequency should be avoided as they can cause the capacitor voltages to diverge. Suitable switching frequencies are then defined for which the arm and line quantities will be periodic and symmetric in the upper and lower arms. The theoretical results are then validated by both simulations and experimental results.
Place, publisher, year, edition, pages
IEEE , 2013. 396-403 p.
Alternating voltages, Capacitor voltages, Circulating current, Fundamental frequencies, Harmonic performance, High-voltage high-power, Low switching frequency, Modular multilevel converters
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject SRA - Energy
IdentifiersURN: urn:nbn:se:kth:diva-134875DOI: 10.1109/ECCE.2013.6646728ISI: 000345216900056ScopusID: 2-s2.0-84891098365ISBN: 978-147990335-1OAI: oai:DiVA.org:kth-134875DiVA: diva2:668801
5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013; Denver, CO; United States; 15 September 2013 through 19 September 2013
QC 201402052013-12-022013-12-012015-01-20Bibliographically approved