DC fault parameter sensitivity analysis

Frederick Page, Grain Adam, Stephen Finney, Derrick Holliday, Lie Xu

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

3 Citations (Scopus)
143 Downloads (Pure)


At present High Voltage Direct Current (HVDC) Voltage Source Converters (VSC) are susceptible dc faults leading to extreme currents. The fault current cannot be controlled by the converter switching flows in the anti-parallel diodes. Protection devices are, therefore, required to operate with sufficient speed to avoid device failure. A method is introduced to calculate the critical time for protection to operate. Using this method it is then shown how the critical time may be extended by way of optimization of passive system components. In order to perform this optimization a new post-fault (when the converter gating signals are inhibited) model of the Modular Multi-Level (MMC) converter is introduced which drastically reduces simulation time, allowing high resolution parameter sweeps to be performed. The model is validated and is shown to produce fault characteristics similar to that of a conventional switched model.

Original languageEnglish
Title of host publicationProceedings of the 12th IET International Conference on Developments in Power System Protection (DPSP 2014)
Place of PublicationStevenage, UK
PublisherInstitution of Engineering and Technology
Number of pages6
ISBN (Print)9781849198349
Publication statusPublished - 2014
Event12th IET International Conference on Developments in Power System Protection, DPSP 2014 - Copenhagen, United Kingdom
Duration: 31 Mar 20143 Apr 2014


Conference12th IET International Conference on Developments in Power System Protection, DPSP 2014
Country/TerritoryUnited Kingdom


  • DC faults
  • high voltage direct current transmission
  • modular multi-level modeling
  • voltage source converters
  • power system protection
  • optimisation techniques
  • DC transmission

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