Study of Heat Localization in HTS Wires at Overload Conditions

A common problem of superconducting devices is to survive during a fault with a current overload. At a fault, superconducting device will have strong overheating and burning out is possible. The problem becomes more serious in case if a high-temperature superconducting (HTS) wire has a weak point wh...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2017-06, Vol.27 (4), p.1-5
Main Authors: Vysotsky, Vitaly S., Zanegin, Sergey Yu, Fetisov, Sergey S., Ryabov, Sergey M., Zubko, Vasily V.
Format: Article
Language:English
Subjects:
Critical current (superconductivity)
Current measurement
Current overloads
Electric potential
Heat
heat localization
Heating
High-temperature superconductors
Localization
Nitrogen
Overheating
overheating of high-temperature superconductors (HTS)
quench development
Spatial resolution
Superconducting devices
Superconducting tapes
Superconductivity
Temperature measurement
Voltage measurement
Wires
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Summary:A common problem of superconducting devices is to survive during a fault with a current overload. At a fault, superconducting device will have strong overheating and burning out is possible. The problem becomes more serious in case if a high-temperature superconducting (HTS) wire has a weak point where the critical current is less than the average over a wire. Such a weak point could be the point of origination of strong overheating within a very localized area. This can lead to burning and destroying of an HTS device. To study this problem, we developed the experimental setup with the spatial resolution 2 mm and the time resolution 1 ms to observe a local temperature/voltage evolution in HTS tapes overloaded by currents. The preliminary experiments were performed to measure local heat/voltage development on 2G HTS tapes with an artificial weak point. Local heat/voltage evolutions have been measured and compared with calculations by our model developed earlier.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2016.2646178