Thermal and electromagnetic design of a DC HTS cable for the future French railway network
Résumé
The use of High-Temperature Superconducting (HTS) lines in electrical grids enables the enhancement of transmission capacities while reducing the right-of-way. Moreover, when carrying currents exceed a few kA, HTS DC cable drastically reduce power losses, footprint and total mass of the system. This presentation describes the electromagnetic design of a DC HTS cable for the new railway network envisioned by the French company SNCF, which must consider ultra-urban requirements [1]. The analytical formulas and algorithms used to design a 1500 V-25 kA class DC cable using commercial (RE)BaCuO tapes are presented, considering the critical current density dependence Jc(B, θ, T). Several configurations of cryogenic lines are also studied. Finally, we discuss the results obtained in terms of the number of superconducting tapes, the cable space requirements and its maximum temperature in the case of short circuit.
[1] S. C. Wimbush and N. M. Strickland, “A Public Database of High-Temperature Superconductor Critical Current Data,”IEEE Transactions on Applied Superconductivity, vol. 27, no. 4, pp. 1–5, Jun. 2017, doi: 10.1109/TASC.2016.2628700.