Study on Clamping Type DC Circuit Breaker with Short Fault Isolation Time and Low Energy Dissipation

Xibei Zhao*, Gen Li, Jianzhong Xu, Jinsha Yuan

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The development of DC grids faces challenges from DC fault protection. The conventional DC circuit breaker (DCCB) employs metal-oxide varistor (MOV) to isolate the faulted line, in which the fault isolation process is coupled with the energy dissipation process. In this study, a clamping type DCCB (CTCB) using internal capacitors to clamp the converter voltage is proposed. Thanks to the proposed configuration, fault isolation and energy dissipation are decoupled, resulting in a fast fault isolation and low energy dissipation compared to the conventional DCCB. The working principle of the proposed CTCB is presented and verified in a DC grid simulation model. A comparison is made with the traditional DCCB. The fault isolation time can be reduced by 34.5%. The dissipated energy can be reduced by 17.4%. The energy dissipation power can be reduced by 76.2%.
Original languageEnglish
JournalCSEE Journal of Power and Energy Systems
Volume9
Issue number5
Pages (from-to)1743-1752
Number of pages10
ISSN2096-0042
DOIs
Publication statusPublished - 2023

Keywords

  • DC circuit breaker
  • DC fault
  • DC protection
  • HVDC grid
  • MMC

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