Thermal and electromagnetic design of a DC HTS cable for the future French railway network
Résumé
The use of High Temperature Superconducting (HTS) cables as a technology is considered as key to increasing the power of the electrical grid while reducing the volume of installation. In addi-tion, when transmission currents exceed a few kA, DC HTS ca-bles significantly reduce power losses, rights-of-way and total sys-tem mass. This article describes the various studies that need to be carried out in order to correctly size HTS DC cables for the new railway network envisaged by the French company SNCF, which must consider ultra-urban needs. The process used to de-sign DC cables for operating powers of 10, 20 and 30 MW at a nominal voltage of 1.5 kV using commercial (RE)BCO tapes is presented. In this sizing process, the critical current density Jc(B, θ, T) dependence of the superconducting tapes, the thermal prop-erties of the materials and the different cooling modes are taken into account. Several solutions are suggested to ensure that the cable can withstand fault currents and reduce recovery time in the initial state. Finally, with the help of analytical models and in-dustrial data, once the cables have been designed, the various sys-tem losses are reported as well as the power or size of the various auxiliary components.
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FINAL_Thermal and Electromagnetic Design of DC HTS Cables for the Future French Railway Network.pdf (3.28 Mo)
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