Capacitor voltage balancing and an intelligent commutation technique in a new modular multilevel converter based HVDC system

Ashish Kumar Sahoo, Ned Mohan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Modular multilevel converters have become widely used in HVDC applications due to easy scalability and near sinusoidal output voltage synthesis. It is made up of an array of submodules comprising of semiconductor switches and floating capacitors. An important challenge in these multilevel topologies is voltage balancing of the floating capacitors. A voltage balancing technique has been proposed for a modular converter with 3-level submodules. This new converter submodule topology results in added benefits over conventional existing half-bridge submodule topologies. An intelligent commutation technique is proposed which results in 2/3rd of the switching transitions to be soft switched. The proposed control is validated by simulations in MATLAB/Simulink.

Original languageEnglish (US)
Title of host publication7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014
PublisherInstitution of Engineering and Technology
ISBN (Print)9781849198158
StatePublished - 2014
Event7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014 - Manchester, United Kingdom
Duration: Apr 8 2014Apr 10 2014

Publication series

Name7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014

Other

Other7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014
CountryUnited Kingdom
CityManchester
Period4/8/144/10/14

Keywords

  • Capacitor voltage balancing
  • Commutation
  • HVDC
  • Modular multilevel converter (MMC)
  • Pulse-width modulation (PWM)

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