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

作者：Kim H M^*; Park K B; Lee B W; Oh I S; Sim J W; Hyun O B; Iwasa Y; Lee H G

来源：Superconductor Science and Technology, 2007, 20(6): 506-510.

DOI：10.1088/0953-2048/20/6/004

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 24 kV 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.

• 出版日期2007-6