Bidirectional Hybrid HVDC CB with a single HV Valve

Dragan Jovcic* (Corresponding Author), Mario Zaja, Mohammad Hedayati

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)
24 Downloads (Pure)


This paper examines two new bidirectional hybrid dc circuit breaker topologies for application in meshed dc grids. The goal is to retain performance of hybrid DC CB with bidirectional current interruption, while reducing semiconductor
count, DC CB size and weight. The fault current is routed to the unidirectional internal valve using multiple additional ultrafast disconnectors. Operation of both topologies is studied using a 320 kV, 16 kA simulation model, as well as demonstrated on a 900 V, 500 A lab prototype. The control systems are presented and discussed in detail. The low-voltage hardware prototypes verify
performance of several new technical and operating solutions in laboratory conditions. A comparison is made with the existing DC CB topologies and performance and reliability compromises of each topology are assessed. The conclusion is that it might be possible to halve the DC CB semiconductor count while retaining same 2 ms opening speed and bidirectional operation.
Original languageEnglish
Pages (from-to)269-277
Number of pages9
JournalIEEE Transactions on Power Delivery
Issue number1
Early online date23 Apr 2019
Publication statusPublished - 1 Feb 2020

Bibliographical note

Funding Information:
This work was supported by the European Union’s Horizon 2020 Research and Innovation Program under Grant 691714. Paper no. TPWRD-01506-2018.


  • DC meshed grids
  • HVDC protection
  • HCB
  • fault current limiting


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