Normal zone initiation and propagation characteristics of a solid nitrogen cooled GdBCO racetrack pancake coil

J. B. Song; K. L. Kim; D. G. Yang; J. Y. Jang; T. K. Ko; M. C. Ahn; H. G. Lee

doi:10.1109/TASC.2011.2180282

Normal zone initiation and propagation characteristics of a solid nitrogen cooled GdBCO racetrack pancake coil

J. B. Song, K. L. Kim, D. G. Yang, J. Y. Jang, T. K. Ko, M. C. Ahn, H. G. Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

This paper presents quench test results, of both experiment and simulation, of a racetrack pancake coil wound with a GdBCO-coated conductor tape in a solid nitrogen (SN2) cooling system at 58 K. The longitudinal normal zone propagation velocities in the curved section were 2 times faster than those in the straight section. Therefore, the straight section should be protected more than the curved section when using racetrack-type, GdBCO pancake coils in large-scale rotating machines. The simulated results showed good agreement with the experimentally observed normal zone initiation times.

Original language	English
Article number	6107558
Journal	IEEE Transactions on Applied Superconductivity
Volume	22
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2011.2180282
Publication status	Published - 2012

Keywords

GdBCO
normal zone propagation (NZP)
protection
racetrack pancake (RP) coil
solid nitrogen (SN2)

ASJC Scopus subject areas

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

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10.1109/TASC.2011.2180282

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title = "Normal zone initiation and propagation characteristics of a solid nitrogen cooled GdBCO racetrack pancake coil",

abstract = "This paper presents quench test results, of both experiment and simulation, of a racetrack pancake coil wound with a GdBCO-coated conductor tape in a solid nitrogen (SN2) cooling system at 58 K. The longitudinal normal zone propagation velocities in the curved section were 2 times faster than those in the straight section. Therefore, the straight section should be protected more than the curved section when using racetrack-type, GdBCO pancake coils in large-scale rotating machines. The simulated results showed good agreement with the experimentally observed normal zone initiation times.",

keywords = "GdBCO, normal zone propagation (NZP), protection, racetrack pancake (RP) coil, solid nitrogen (SN2)",

author = "Song, {J. B.} and Kim, {K. L.} and Yang, {D. G.} and Jang, {J. Y.} and Ko, {T. K.} and Ahn, {M. C.} and Lee, {H. G.}",

note = "Funding Information: Manuscript received September 12, 2011; accepted November 11, 2011. Date of publication December 16, 2011; date of current version May 24, 2012. This study was supported by the Mid-career Researcher Program through an NRF grant funded by the MEST (2009-0085369). This study was also supported by the International Collaborative R&D Program of the KETEP grant funded by the Korea government Ministry of Knowledge Economy (MKE).",

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AU - Song, J. B.

AU - Kim, K. L.

AU - Yang, D. G.

AU - Jang, J. Y.

AU - Ko, T. K.

AU - Ahn, M. C.

AU - Lee, H. G.

N1 - Funding Information: Manuscript received September 12, 2011; accepted November 11, 2011. Date of publication December 16, 2011; date of current version May 24, 2012. This study was supported by the Mid-career Researcher Program through an NRF grant funded by the MEST (2009-0085369). This study was also supported by the International Collaborative R&D Program of the KETEP grant funded by the Korea government Ministry of Knowledge Economy (MKE).

PY - 2012

Y1 - 2012

N2 - This paper presents quench test results, of both experiment and simulation, of a racetrack pancake coil wound with a GdBCO-coated conductor tape in a solid nitrogen (SN2) cooling system at 58 K. The longitudinal normal zone propagation velocities in the curved section were 2 times faster than those in the straight section. Therefore, the straight section should be protected more than the curved section when using racetrack-type, GdBCO pancake coils in large-scale rotating machines. The simulated results showed good agreement with the experimentally observed normal zone initiation times.

AB - This paper presents quench test results, of both experiment and simulation, of a racetrack pancake coil wound with a GdBCO-coated conductor tape in a solid nitrogen (SN2) cooling system at 58 K. The longitudinal normal zone propagation velocities in the curved section were 2 times faster than those in the straight section. Therefore, the straight section should be protected more than the curved section when using racetrack-type, GdBCO pancake coils in large-scale rotating machines. The simulated results showed good agreement with the experimentally observed normal zone initiation times.

KW - GdBCO

KW - normal zone propagation (NZP)

KW - protection

KW - racetrack pancake (RP) coil

KW - solid nitrogen (SN2)

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SN - 1051-8223

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JO - IEEE Transactions on Applied Superconductivity

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ER -

Normal zone initiation and propagation characteristics of a solid nitrogen cooled GdBCO racetrack pancake coil

Abstract

Keywords

ASJC Scopus subject areas

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