Ring DC node configurations for enhanced DC fault protection in multiterminal HVDC networks

Azmy Gowaid, F. Page, G. P. Adam, B. W. Williams, J. Fletcher

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

3 Citations (Scopus)


This paper proposes a ring dc node configuration for more reliable multi-terminal dc grid fault protection. The proposed ring node is tolerant to the loss of one dc circuit breaker. It results in reduced steady state current flow in node branches relative to a conventional star node connection. This reduces on-state losses of solid-state circuit breakers, as well as any dc-dc converters to be used to administer dc fault blocking in addition to voltage matching. The short circuit breaking capacity of each utilized circuit breaker is also reduced since current stresses are distributed among dc breakers within the ring node. The proposed node configurations are of importance for medium and high voltage dc grids interfacing renewable sources (for example, offshore wind) to the onshore ac grid.
Original languageEnglish
Title of host publication2015 International Conference on Renewable Energy Research and Applications, ICRERA 2015
Place of PublicationPalmero
Number of pages5
ISBN (Electronic)9781479999828
ISBN (Print)9781479999828
Publication statusPublished - 2015


  • DC-DC power convertors
  • HVDC power convertors
  • circuit breakers
  • power grids
  • power system faults
  • power system protection
  • power system reliability
  • DC fault blocking
  • DC-DC converters
  • multiterminal DC grid fault protection
  • multiterminal HVDC networks
  • ring DC node
  • solid-state circuit breakers
  • steady state current flow
  • voltage matching
  • Electron traps
  • Europe
  • HVDC transmission
  • Matched filters
  • Wind power generation
  • HVdc
  • dc-dc Converter
  • multiterminal dc grid
  • offshore wind power


Dive into the research topics of 'Ring DC node configurations for enhanced DC fault protection in multiterminal HVDC networks'. Together they form a unique fingerprint.

Cite this