NDLI: Quench Detection Method for Cryocooler-Cooled YBCO Pancake Coil for SMES

Content Provider	IEEE Xplore Digital Library
Author	Ohnishi, H. Ishiyama, A. Watanabe, T. Hirano, N. Nagaya, S.
Copyright Year	2002
Abstract	In this study, we focus on a quench detection method for a cryocooler-cooled double pancake coil wound with an YBCO bundle conductor for superconducting magnetic energy storage. Because the local normal-zone propagation velocity is significantly slower in a high-temperature superconducting coil than that in a low-temperature superconducting coil, it is difficult to detect the local normal transition using a voltage between both coil ends. In the application of an YBCO coil for superconducting magnetic energy storage, quench detection is considered to be more difficult because of the noise of the converter or other equipment. Therefore, the normal transition and quench must be detected using some other method. A current detection method, which measures the current redistribution in the YBCO coil with hall probes, was proposed and verified to be able to determine the normal transition by the numerical simulations in the previous paper. In this study, on the basis of the current detection method, the experiments and numerical simulation were performed on a cryocooler-cooled small model double-pancake coil wound with an YBCO bundle conductor composed of four electrically insulated YBCO tapes. As the results, the current detection method was verified to be effective in detecting the local normal transition; Hall probes were used to measure the magnetic field and to estimate the current in individual YBCO tapes making up the bundle conductor.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	4701404
Ending Page	4701404
Page Count	1
File Size	692586
File Format	PDF
ISSN	10518223
Volume Number	23
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Yttrium barium copper oxide Heating Conductors Current measurement Probes YBCO coil Quench detection YBCO bundle conductor
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Experiment and Numerical Simulation on Quench Detection in Cryocooler-Cooled YBCO Coil for SMES Application

Quench Detection and Protection of Cryocooler-Cooled YBCO Pancake Coil for SMES

Quench Behavior and Protection in Cryocooler-Cooled YBCO Pancake Coil for SMES

Quench Studies of YBCO Insulated and Noninsulated Pancake Coils

Fabrication Test of YBCO Coil and Multi-Tape Conductor

Evaluation of Conduction Cooling Effect of Cryocooler-Cooled HTS Coils for SMES Application

Design of a Quench Protection System for a Coated Conductor Insert Coil

Thermal Stability of Conduction-Cooled YBCO Pancake Coil

Electrical AC Loss Measurements on a 2G YBCO Coil

Quench Detection Method for Cryocooler-Cooled YBCO Pancake Coil for SMES

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Experiment and Numerical Simulation on Quench Detection in Cryocooler-Cooled YBCO Coil for SMES Application

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