Current limitation with bulk Y-Ba-Cu-O

The fault current limiter is a very attractive device for electric networks. Meander pattern conductors cut from bulk melt textured YBCO were studied for this application. The meanders are put in series and/or in parallel to match the required current and voltage. The YBCO materials are attractive b...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2001-03, Vol.11 (1), p.2034-2037
Main Authors: Tixador, P., Porcar, L., Floch, E., Buzon, D., Isfort, D., Bourgault, D., Chaud, X., Tournier, R.
Format: Article
Language:English
Subjects:
Applied sciences
Conducting materials
Conductivity
COPPER OXIDE
CURRENT DENSITY
DENSITY
Devices
Electric potential
ELECTRICAL CONDUCTIVITY
ELECTRONIC PRODUCTS
Electronics
Exact sciences and technology
Fault current limiters
Hot spots
Meanders
Melts
Nitrogen
Operating temperature
Physics
Power dissipation
QUENCHING MECHANISMS
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superconducting devices
SUPERCONDUCTORS
Temperature distribution
Temperature sensors
Voltage
YBCO superconductors
Yttrium barium copper oxide
YTTRIUM OXIDE
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Summary:The fault current limiter is a very attractive device for electric networks. Meander pattern conductors cut from bulk melt textured YBCO were studied for this application. The meanders are put in series and/or in parallel to match the required current and voltage. The YBCO materials are attractive because they show a very effective limitation with a relative low volume (high engineering current density and normal state resistivity). However, they are sensitive to hot spots. To avoid these destructive hot spots the operating temperature is chosen very close to the critical temperature (above 90 K). This temperature range is reached using a pressurised liquid nitrogen bath. Working close to Tc has two major advantages. The first is reduced values of Jc which limit the power dissipation. The Jc can be matched by changing the pressure on the nitrogen bath. The second is that the proximity of the normal state is favourable for homogeneous quenches along the whole meander as it can be experimentally recorded. Results obtained on single meanders and on the whole assembly are reported under steady state operation as well as during current limitation. Forty three meanders in series limited the current to 740 A (11 000 A unlimited value) under 1 kV.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.920254