HTS coil with enhanced thermal stability in over-current operation for fast response magnet power application

Hyungjun Kim, Jinsub Kim, Jeyull Lee, Tae Kuk Ko

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper examines the effect of improved winding geometry on high-temperature superconducting (HTS) coils for use in superconducting power applications. One of the most important functions in such a superconducting magnetic energy storage system is to charge-discharge the superconducting coils as fast as possible to secure sufficient power demand. The HTS coils are vulnerable to the thermal instability caused by cyclic and/or unexpected charge-discharge variation. Therefore, it is necessary to enhance the safety of the HTS coils under fast response operation at the request of varying loads. In this study, improved thermal stability in over-current operation is demonstrated by implementing the proposed insulation scheme. The performance of the HTS coil with the proposed winding geometry was experimentally evaluated in comparison with a conventional insulation (CI) coil. Cryo-stability characteristics of the proposed coil are verified with a circuit analysis under a charge-discharge operation scenario. The results of this study show the usefulness of the proposed winding coil as a replacement for CI coils, which have drawbacks related to thermal recovery rate in over-current operation.

Original languageEnglish
Article number105006
JournalSuperconductor Science and Technology
Volume28
Issue number10
DOIs
Publication statusPublished - 2015 Aug 24

Fingerprint

Magnets
Thermodynamic stability
thermal stability
magnets
coils
Insulation
insulation
Temperature
Geometry
Electric network analysis
Energy storage
magnetic energy storage
Superconducting coils
thermal instability
Recovery
geometry
safety
recovery
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

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abstract = "This paper examines the effect of improved winding geometry on high-temperature superconducting (HTS) coils for use in superconducting power applications. One of the most important functions in such a superconducting magnetic energy storage system is to charge-discharge the superconducting coils as fast as possible to secure sufficient power demand. The HTS coils are vulnerable to the thermal instability caused by cyclic and/or unexpected charge-discharge variation. Therefore, it is necessary to enhance the safety of the HTS coils under fast response operation at the request of varying loads. In this study, improved thermal stability in over-current operation is demonstrated by implementing the proposed insulation scheme. The performance of the HTS coil with the proposed winding geometry was experimentally evaluated in comparison with a conventional insulation (CI) coil. Cryo-stability characteristics of the proposed coil are verified with a circuit analysis under a charge-discharge operation scenario. The results of this study show the usefulness of the proposed winding coil as a replacement for CI coils, which have drawbacks related to thermal recovery rate in over-current operation.",
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HTS coil with enhanced thermal stability in over-current operation for fast response magnet power application. / Kim, Hyungjun; Kim, Jinsub; Lee, Jeyull; Ko, Tae Kuk.

In: Superconductor Science and Technology, Vol. 28, No. 10, 105006, 24.08.2015.

Research output: Contribution to journalArticle

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T1 - HTS coil with enhanced thermal stability in over-current operation for fast response magnet power application

AU - Kim, Hyungjun

AU - Kim, Jinsub

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AU - Ko, Tae Kuk

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AB - This paper examines the effect of improved winding geometry on high-temperature superconducting (HTS) coils for use in superconducting power applications. One of the most important functions in such a superconducting magnetic energy storage system is to charge-discharge the superconducting coils as fast as possible to secure sufficient power demand. The HTS coils are vulnerable to the thermal instability caused by cyclic and/or unexpected charge-discharge variation. Therefore, it is necessary to enhance the safety of the HTS coils under fast response operation at the request of varying loads. In this study, improved thermal stability in over-current operation is demonstrated by implementing the proposed insulation scheme. The performance of the HTS coil with the proposed winding geometry was experimentally evaluated in comparison with a conventional insulation (CI) coil. Cryo-stability characteristics of the proposed coil are verified with a circuit analysis under a charge-discharge operation scenario. The results of this study show the usefulness of the proposed winding coil as a replacement for CI coils, which have drawbacks related to thermal recovery rate in over-current operation.

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