Abstract
The design for even current sharing in high-T/sub C/ superconducting (HTSC) power transmission cable is required to increase the current transmission capacity and decrease the AC loss. Increasing the contact resistance of each layer is effective method for achieving the uniform current distribution among conducting layers. However, this method increases the power loss and causes the efficiency of HTSC cable system to decrease. Another method to adjust the pitch length and the winding direction of each layer is complicated, which is difficult for the cable designer to find a simple solution for the uniform current distribution. In this paper, we investigated the current distribution of HTSC cable dependent on the pitch length and the winding direction of each layer for two cases: four-layer HTSC cable with a shield layer and four-layer HTSC cable without a shield layer. It could be found through the analysis from the computer simulations that the shield layer of HTSC cable could contribute to the improvement of current distribution of each layer at the specific pitch length and winding direction. The result and discussion for the current distribution calculated for HTSC power transmission cable with a shield layer were presented and compared with the cable without a shield layer.
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