Abstract
AC losses in two, one-meter-long lengths of HTS prototype multi-strand conductors (PMC’s) are measured with a temperature-difference calorimeter. Both single-phase and three-phase losses are examined with ac currents up to 1000 A rms. The calorimeter, designed specifically for these measurements, has a precision of 1 mW. PMC #1 has two helically-wound, non-insulated layers of HTS tape (19 tapes per layer), each layer wrapped with opposite pitch. PMC #2 is identical except for insulation between the layers. The measured ac losses show no significant effect of interlayer insulation and depend on about the third power of the current -- a result in agreement with the Bean-Norris model adapted to the double-helix configuration. The three-phase losses are a factor of two higher that those exhibited by a single isolated conductor, indicating a significant interaction between phases.
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Daney, D.E., Boenigl, H.J., Maley, M.P., Coulters, J.Y., Fleshler, S. (1998). Single and Three-Phase AC Losses in HTS Superconducting Power Transmission Line Prototype Cables. In: Balachandran, U.B., Gubser, D.G., Hartwig, K.T., Reed, R.P., Warnes, W.H., Bardos, V.A. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering, vol 44. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9056-6_104
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DOI: https://doi.org/10.1007/978-1-4757-9056-6_104
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