Design optimization of high-voltage HTS three-phase cables with screened phases

Abstract

Abstract Design versions of HTS cables with the screened phases ensuring the AC losses minimization have been investigated by the numerical simulation methods. The following methods of optimization have been proposed: sectioning of phases, using of HTS tapes with the modified configuration and variation of the phase diameter. At the critical current of a phase of 5.1 kA and its rated current of 4 kA, these methods allow lowering of AC losses level to 0.45 – 0.017 W/m what is much lower than natural heat fluxes into a cryostat. The designs proposed are compared with ones of the optimized tri-axial cables what allows a reasonable choosing of a cable type vs. a given electric power system design.