NDLI: Reconstruction of current unbalance in full-size ITER NbTi CICC by self-field measurements

Content Provider	IEEE Xplore Digital Library
Author	Ilyin, Yu.A. Nijhuis, A. Kate, H.H.Jt. Bruzzone, P. Stepanov, B.
Copyright Year	2002
Abstract	Methods have been developed to study the distribution of the transport current among the strand bundles of cable-in-conduit conductors (CICC) by using self-field measurements with Hall probe arrays. The unbalance in the transport current is mainly caused by the unavoidable nonuniformity of the joints and can be a reason for a change in the voltage-temperature characteristic and consequently of the temperature margin. In the present study we focus on the reconstruction of the current unbalance in a full size NbTi CICC tested in the SULTAN test facility. The crucial point in the reconstruction procedure is the proper choice of the reference self-field profile corresponding to a uniform current distribution. To achieve this uniform distribution, the conductors were driven far into the current sharing regime. The self-field profile corresponding to the highest achieved voltage level was taken as a reference. This assumption is supported by the modeling of current-sharing runs in the CUDI-CICC network model. Furthermore, local redistribution effects were observed in the conductors at high currents. The current transfer associated with this redistribution is analyzed as well.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1391
Ending Page	1394
Page Count	4
File Size	267693
File Format	PDF
ISSN	10518223
Volume Number	15
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Niobium compounds Titanium compounds Current measurement Conductors Voltage Power cables Hall effect devices Temperature Testing Test facilities self-field measurements Cable-in-conduit conductor current distribution ITER PF conductor
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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DC performances of ITER NbTi conductors: models vs. measurements

DC Performance Results Versus Assessment of ITER Main Busbar NbTi Conductors

Test results of the ITER PF insert conductor short sample in SULTAN

Current Redistribution Inside ITER Full-Size Conductors Well Before Any Transition Voltage Detection

Results of Contact Resistance Distribution in NbTi and Nb$_{3}$Sn ITER Conductor Termination

Installation and Test Programme of the ITER Poloidal Field Conductor Insert (PFCI) in the ITER Test Facility at JAEA Naka

Quench Characteristics of an NbTi CICC With Non-Uniform Current Distribution

Interstrand Resistance and Current Redistribution in a Cable-In-Conduit Conductor (CICC) Termination

Comparison of the DC Performance of Full- and Sub-Size$rm NbTi$Cable-in-Conduit Conductors

Reconstruction of current unbalance in full-size ITER NbTi CICC by self-field measurements

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DC performances of ITER NbTi conductors: models vs. measurements

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