Temperature and pressure simulation of a high-temperature superconducting cable cooled by subcooled LN2 with fault current

Yusuke Sato, Koh Agatsuma, Xudong Wang, Atsushi Ishiyama

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    A computer simulation has been developed to estimate the transient temperature and pressure distributions in a high-temperature superconducting (HTS) power cable cooled by a forced flow of subcooled LN2. This simulation is critical for assessing the effects of short-circuit accidents in practical HTS power cables. When a fault occurs, an excessive current of 31.5 kA may flow in a cable for 2 s, and it is important to understand the temperature and pressure profiles in a cable cooled by the forced flow of LN2 when these faults occur until the disturbance flows out from a cable. The temperature profile of the LN2 coolant and the cable cores was analyzed by solving heat conduction and heat transfer equations using the finite-difference method. The Cryodata GASPAK software package was used to estimate the fluid properties. The simulation results show a fairly good agreement with the experimental results. By employing a new model of the induction refrigeration system and the circulation pump, a small discrepancy is resolved in pressures between simulation and experiment. The analysis results show that the pressure in the cable significantly changes depending on the initial gas volumes in the terminals and the volume of the LN2 gas that evaporates from the copper former in the cable.

    Original languageEnglish
    Article number7000527
    JournalIEEE Transactions on Applied Superconductivity
    Volume25
    Issue number3
    DOIs
    Publication statusPublished - 2015 Jun 1

    Fingerprint

    Superconducting cables
    Electric fault currents
    cables
    Cables
    simulation
    Temperature
    temperature
    temperature profiles
    Gases
    Cable cores
    intake systems
    Refrigeration
    short circuits
    Heat conduction
    Finite difference method
    Software packages
    Pressure distribution
    Short circuit currents
    coolants
    Coolants

    Keywords

    • fault currents
    • heat transfer
    • heat-conduction equations
    • High-temperature superconductors
    • power cables
    • subcooled LN2

    ASJC Scopus subject areas

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

    Cite this

    Temperature and pressure simulation of a high-temperature superconducting cable cooled by subcooled LN2 with fault current. / Sato, Yusuke; Agatsuma, Koh; Wang, Xudong; Ishiyama, Atsushi.

    In: IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, 7000527, 01.06.2015.

    Research output: Contribution to journalArticle

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