Fault current limitation characteristics of the Bi-2212 bulk coil for distribution-class superconducting fault current limiters

Jungwook Sim, Haigun Lee, Sung Woo Yim, Hye Rim Kim, Ok Bae Hyun, Kwon Bae Park, Bang Wook Lee, Il Sung Oh, Ho Min Kim

Research output: Contribution to journalArticle

Abstract

We investigated fault current limitation characteristics of the resistive superconducting fault current limiter (SFCL) which consisted of a Bi-2212 bulk coil and a shunt coil. The Bi-2212 bulk coil and the shunt coil were connected in parallel. The Bi-2212 bulk coil was placed inside the shunt coil to induce field-assisted quench. The fault test was conducted at an input voltage of 200 Vrms and fault current of 12 kArms and 25 kA rms. The fault conditions were asymmetric and symmetric, and the fault period was 5 cycles. The test results show that the SFCL successfully limited the fault current of 12 kArms and 25 kArms to below 5.5 ∼ 6.9 kApeak within 0.64 ∼ 2.17 msec after the fault occurred. Limitation was faster under symmetric fault test condition due to the larger change rate of current. We concluded that the speed of fault current limitation was determined by the speed of current rise rather than the amplitude of a short circuit current. These results show that the Bi-2212 bulk coil is suitable for distribution-class SFCLs.

Original languageEnglish
Pages (from-to)277-281
Number of pages5
JournalTransactions of the Korean Institute of Electrical Engineers
Volume56
Issue number2
Publication statusPublished - 2007 Oct 31

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Keywords

  • Distribution-class
  • Field-assisted quench
  • SFCL:.Bi-2212 bulk coil
  • Superconducting fault current limiter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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