A numerical method for spatially-distributed transient simulation to replicate nonlinear 'defect-irrelevant' behaviors of no-insulation HTS coil

Geonyoung Kim, Andrea Musso, Jeseok Bang, Jung Tae Lee, Chaemin Im, Kibum Choi, Jaemin Kim, Marco Breschi, Ki Jin Han, Seungyong Hahn

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20 Scopus citations

Abstract

This paper presents a numerical method, based on the partial element equivalent circuit (PEEC) technique, for spatially-distributed and time-varying simulation to analyze nonlinear 'defect-irrelevant' behaviors of a no-insulation (NI) high temperature superconductor (HTS) coil. We suggest a resistivity parameterization approach in combination of the PEEC method to replicate electromagnetic dynamics of an NI HTS coil containing multiple 'defects.' The proposed method is adopted to investigate 'defect-irrelevant' behaviors of an NI single pancake coil having lap joints as a form of artificial defects. To validate our approach, electromagnetic characteristics of the NI test coil are measured in a bath of liquid nitrogen at 77 K and compared with four key simulation results: (a) local voltages; (b) current distribution; (c) magnetic field; and (d) Joule heating distribution. Experimental measurements of local voltages and the magnetic field are compared to the simulation results to validate our numerical method.

Original languageEnglish
Article number115004
JournalSuperconductor Science and Technology
Volume34
Issue number11
DOIs
StatePublished - Nov 2021

Keywords

  • defect-irrelevant-winding
  • no-insulation winding
  • partial element equivalent circuit
  • resistivity parameterization

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