Abstract
We have calculated the alternating current (ac) losses of a 114 MVA high- T c superconducting (HTS) transmission cable using an electric-circuit (EC) model. The EC model is comprised of a resistive part and an inductive part. The resistive part is obtained by the approximated Norris equation for a HTS tape. The Norris equation indicates hysteresis losses due to self-fields. The inductive part has two components, i.e. inductances related to axial fields and those related to circumferential fields. The layer currents and applied fields of each layer were calculated by the EC model. By using both values, the ac losses of the one-phase HTS cable were obtained by calculation considering the self-fields, the axial fields and the circumferential fields of the HTS tape. The measured ac loss is almost equal to the calculation.
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