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Modelling of superconducting cables

An electrical model for multi-layer superconducting cables was developed, which can be used for finding the optimal geometrical configurations (winding pitch and direction of each layer), leading to a uniform current distribution among the layers and giving the lowest AC losses. The model is implemented in the common engineering software MATLAB.

This model can take into account the three-dimensional structure of the cables and its rapidity of calculations allows investigating a great number of combinations of the geometrical parameters. The model can be applied for cables with different number of layers.

The finite element method was used in addition for computing in detail the current and magnetic field distribution inside the tapes composing the cable, in order to precisely evaluate the AC losses, which are strongly influenced by the geometry of the tapes and their arrangement in the cable structure. The dependence of the transport properties of the cable on the generated self magnetic field was also taken into account, since for high applied currents the self-field effects are significant and cannot be neglected.

The developed models may be of interest to manufactures and end-users of superconducting power cables.

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Reported by

Swiss Federal Institute of Technology – Lausanne (EPFL)
EPFL IN Ecublens
1015 Lausanne
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