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Design tools and optimization for DC HTS cables for the future railway network in France
Ghazi Hajiri  1, *@  , Kevin Berger  1@  , Rémi Dorget  2, 1@  , Jean Lévêque  3@  , Hervé Caron  4@  
1 : Group of Research in Electrical Engineering of Nancy (GREEN)
Université de Lorraine
Faculté des Sciences et Technologies, Campus Aiguillettes, BP 70239, 54506 Vandœuvre-lès-Nancy -  France
2 : Safran Tech
SAFRAN
Rue des Jeunes Bois, Châteaufort, 78114 Magny-Les-Hameaux -  France
3 : Group of Research in Electrical Engineering of Nancy (GREEN)
Université de Lorraine
Faculté des Sciences et Technologies, Campus Aiguillettes, BP 70239, 54506 Vandœuvre-lès-Nancy -  France
4 : SNCF Réseau
Société nationale des Chemins de Fer français - SNCF
15-17 rue Jean-Philippe Rameau, 93418 La Plaine Saint-Denis -  France
* : Corresponding author

The use of High Temperature Superconducting (HTS) cables in power systems increases transmission capacity while reducing the volume of the installation. In addition, when transmission currents exceed a few kA, HTS DC cables significantly reduce power losses, rights-of-way and total system mass. This summary describes the various studies to be carried out in order to correctly dimension DC HTS cables for the new railway network envisaged by the French company SNCF, which has to take into account the ultra-urban needs. The process used to design DC cables for different operating current values between 5 kA and 20 kA at 1 750 V using commercial (RE)BaCuO tapes is presented. In this design stage, the dependence of the critical current density Jc(B, θ, T) of the superconducting tapes, the thermal properties of the materials used, and the different cooling modes as a function of the cable length were taken into account. Finally, we are discussing a cryogenic solution to protect the cable in case of short-circuit or overload.



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