Enhanced control strategy of full-bridge modular multilevel converter

G. P. Adam, S. J. Finney, B. W. Williams

Research output: Contribution to conferencePaperpeer-review

10 Citations (Scopus)
248 Downloads (Pure)


This paper describes a control approach that allows the cell capacitor voltages of the full-bridge modular multilevel converter (FB-MMC) to be controlled independent of the input dc link voltage. Moreover, this control approach offers the possibility of operating FB-MMC from bi-polar dc link voltages; thus, creating new possibilities for building generic hybrid dc grids with reversible dc link voltage, where the conventional line commutated current source converters can operate alongside voltage source converters. Furthermore, the presented control approach improves the dc fault ride-through of the FB-MMC compared to existing approaches. This could be achieved by an active control of the arm currents and cell capacitor voltages, and full exploitation of the FB-MMC redundant switch states. Operation of the FB-MMC with reversible DC link voltage and decoupled control of the cell capacitor voltages from the dc link voltage are demonstrated using simulations. The major findings and implications of this work are highlighted.
Original languageEnglish
Pages1432 - 1436
Number of pages5
Publication statusPublished - 22 Nov 2015
Event2015 International Conference on Renewable Energy Research and Applications (ICRERA) - Palermo , Italy
Duration: 22 Nov 201525 Nov 2015


Conference2015 International Conference on Renewable Energy Research and Applications (ICRERA)
Abbreviated titleICRERA 2015


  • DC fault ride-through capability
  • DC short circuit proof
  • high-voltage DC transmission systems
  • half and full bridge modular multilevel converters
  • line commutated converter
  • voltage control
  • voltage measurement
  • capacitors
  • circuit faults
  • modulation


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