A stability verification technique using acoustic emission for an HTS monofilar component for a superconducting fault current limiter

H. M. Kim, K. B. Park, B. W. Lee, I. S. Oh, J. W. Sim, O. B. Hyun, Y. Iwasa, Haigun Lee

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Abstract

This paper reports an acoustic emission (AE) technique that was developed for detecting the quenching and stability characteristics of high-temperature superconductors (HTSs), particularly a BSCCO-2212 monofilar component for a resistive superconducting fault current limiter (SFCL) system. The 24kV class SFCL, which was recently developed by the KEPRI-LSIS collaboration group in Korea, requires almost 150 BSCCO-2212 monofilar components. A BSCCO-2212 monofilar HTS undergoes thermal and mechanical stress creating microcracks during and after quenching or reaching a fault state such as during a short-circuit test. The AE technique is a useful tool for detecting the presence of transient heating and the existence of hot spots within the superconducting fault current component.

Original languageEnglish
Article number004
Pages (from-to)506-510
Number of pages5
JournalSuperconductor Science and Technology
Volume20
Issue number6
DOIs
Publication statusPublished - 2007 Jun 1

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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