Stability analysis of HTS power cable with fault currents

Mitsuho Furuse*, Shuichiro Fuchino, Koh Agatsuma, Takato Masuda, Masayoshi Ohya, Shoichi Honjo, Tomoo Mimura, Yu Noguchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We numerically calculated the transient temperature distribution of flowing subcooled liquid nitrogen in a high-Tc superconducting (HTS) model cable when faults occur. The coolant and cable core temperatures were calculated by numerically solving the heat equation using the finite difference method. In the calculation, we assume that the heat transfer coefficient between the flowing subcooled liquid nitrogen and the cable core surface is described by the Dittus-Boelter correlation. The calculation results reveal that the coolant temperature increases even after the fault has been removed and that it continues increasing until fresh coolant arrives from the inlet. The calculated temperature profile of the coolant agrees well with measured data obtained by conducting over-current tests on a model HTS cable. Using our computational code, we also evaluated the maximum HTS cable lengths that ensure that the coolant remains in the liquid phase for certain fault currents for an HTS model cable.

Original languageEnglish
Article number5624595
Pages (from-to)1021-1024
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume21
Issue number3 PART 2
DOIs
Publication statusPublished - 2011 Jun
Externally publishedYes

Keywords

  • Fault current
  • Heat transfer
  • High-temperature superconductors
  • Subcooled liquid nitrogen
  • Superconducting cables

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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