Modeling, Experimental Validation, and Application of VARC HVDC Circuit Breakers

Siyuan Liu, Marjan Popov, Seyed Sattar Mirhosseini, Simon Nee, Tomas Modeer, Lennart Ängquist, Nadew Belda, Kees Koreman, Mart A.M.M. van der Meijden

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)
37 Downloads (Pure)


This paper deals with the modeling, hardware results and model validation by measurements of a VSC assisted resonant current (VARC) dc circuit breaker (CB) and the application within a future network by simulation. The newly emerging VARC dc CB can be used as a solution for the protection of offshore multi-terminal HVDC (MTDC) grids. In this paper, the proposed VARC dc CB is modeled in detail in a PSCAD environment, by taking into account dielectric strength of the vacuum gap, high-frequency current quenching ability and parasitic components. The PSCAD-model is then verified by data from the testing of a 27 kV VARC dc CB prototype with maximum current interruption capability of 10 kA. Additionally, the initial transient interruption voltage and current slope at zero-crossing during the interruption are analyzed. With respect to scaling to a higher voltage level, three types of series connected modules are presented and the performances are compared. The performance of the series connected modules is simulated in a model of a 4-terminal HVDC grid. The obtained results validate the VARC dc CB as a promising solution for the dc fault isolation in MTDC grids.

Original languageEnglish
Article number8869738
Pages (from-to)1515-1526
Number of pages12
JournalIEEE Transactions on Power Delivery
Issue number3
Publication statusPublished - 2020


  • circuit breaker performance
  • HVDC circuit breaker
  • HVDC grid
  • transient analysis
  • VARC


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