Quench behavior and protection in cryocooler-cooled YBCO pancake coil for SMES

Atsushi Ishiyama, Hiroshi Ueda, Yoshiaki Aoki, Koji Shikimachi, Naoki Hirano, Shigeo Nagaya

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    The thermal behavior of a high-temperature superconducting (HTS) coil is significantly different from that of lowtemperature superconducting (LTS) coil because it has a greater volumetric heat capacity at the temperature required for practical use. Therefore, the possibility of quench in HTS coils is much lower than that in LTS coils. In the application of the YBCO coil to Superconducting Magnetic Energy Storage (SMES) system, electrical charging and discharging are repeated; therefore, the superconducting characteristics of the YBCO coated conductor may deteriorate as a result of cyclic subjection to tensile strain. To enhance the reliability and safety of HTS coil, protection scheme assuming a quench is also required for HTS coil. In this study, we focus on the coil wound with YBCO laminated bundle (parallel) conductor supposing SMES application and investigate the characteristics of normal-zone propagation and the thermal behavior within the coil during a quench by using a newly developed computer code based on the finite element method and an equivalent circuit. And we also propose a quench detection method using observation of nonuniform current in YBCO laminated bundle conductor and discuss the validity of the detection method comparing with conventional quench-voltage detection.

    Original languageEnglish
    Article number5675702
    Pages (from-to)2398-2401
    Number of pages4
    JournalIEEE Transactions on Applied Superconductivity
    Volume21
    Issue number3 PART 2
    DOIs
    Publication statusPublished - 2011 Jun

    Fingerprint

    magnetic energy storage
    Energy storage
    coils
    Temperature
    conductors
    bundles
    Tensile strain
    Equivalent circuits
    Specific heat
    Superconducting coils
    Finite element method
    equivalent circuits
    charging
    safety
    finite element method
    Electric potential
    specific heat
    computer programs

    Keywords

    • Normal propagation
    • Protection
    • SMES
    • Stability

    ASJC Scopus subject areas

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

    Cite this

    Quench behavior and protection in cryocooler-cooled YBCO pancake coil for SMES. / Ishiyama, Atsushi; Ueda, Hiroshi; Aoki, Yoshiaki; Shikimachi, Koji; Hirano, Naoki; Nagaya, Shigeo.

    In: IEEE Transactions on Applied Superconductivity, Vol. 21, No. 3 PART 2, 5675702, 06.2011, p. 2398-2401.

    Research output: Contribution to journalArticle

    Ishiyama, Atsushi ; Ueda, Hiroshi ; Aoki, Yoshiaki ; Shikimachi, Koji ; Hirano, Naoki ; Nagaya, Shigeo. / Quench behavior and protection in cryocooler-cooled YBCO pancake coil for SMES. In: IEEE Transactions on Applied Superconductivity. 2011 ; Vol. 21, No. 3 PART 2. pp. 2398-2401.
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