Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability

K.H. Ahmed, A.A. Aboushady

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

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Abstract

One of the main challenges of voltage source converter based HVDC systems is DC faults. In this paper, two different modified half-bridge modular multilevel converter topologies are proposed. The proposed converters offer a fault tolerant against the most severe pole-to-pole DC faults. The converter comprises three switches or two switches and 4 diodes in each cell, which can result in less cost and losses compared to the full-bridge modular multilevel converter. Converter structure and controls are presented including the converter modulation and capacitors balancing. MATLAB/SIMULINK simulations are carried out to verify converter operation in normal and faulty conditions.
Original languageEnglish
Title of host publicationIECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE
Pages4676-4682
Number of pages7
ISBN (Electronic)978-1-4799-4032-5
ISBN (Print)9781479940325
DOIs
Publication statusPublished - 26 Feb 2015

Keywords

  • capacitors
  • topology
  • circuit faults
  • power conversion
  • modulation
  • bridge circuits

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