Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 51: Focus Session: Electric Power Applications of Superconductivity

TT 51.2: Topical Talk

Mittwoch, 18. März 2015, 10:00–10:30, H 0104

Conductors and Cables from REBCO High Temperature Superconductors for Applications — •Wilfried Goldacker — Karlsruher Institut für Technologie - ITEP, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Deutschland

The availability of commercial REBCO high temperature superconductor (HTS) tapes enables a couple of applications in magnets, current limiters, power lines, transformer and rotating machinery. The HTS material has to be conditioned or assembled to cables for the different applications to achieve the required currents and technical features. The conductor performance, however, is still far from perfection, in particular the homogeneity of the current carrying capacity. Features requested for the specific application are very high operation currents, low AC losses, thermal and mechanical stabilization and filament structures. We review typical REBCO tape features and show the impact on the designs and efforts to develop high current cables from such tapes, including a review of the running investigations in different laboratories. Two of the most promising and advanced cables presented in detail, the Roebel cable and the CORC cable (Conductor on round core), are concepts with transposition of the strands and reduced AC losses. The status of the development, the cable features under different aspects, the achieved transport currents and the future potential are discussed. Finally examples for applications, as HTS fusion or accelerator magnets, are addressed with the related conductor development, followed by conclusions on the expected future potential of the material for such purpose.