抄録
Imbalance of the current distribution in the multilayer high-Tc superconducting power transmission cable tends to result in serious problems, which means it increases the loss and deteriorates the transport current capacity of the cable. To solve this problem, a method to prevent the imbalance by adjusting the twist pitch angles of the superconducting tapes has been investigated. At first, a method to calculate the current of each layer for a multilayer coaxial cable has been proposed. Using the method, the twist pitch angles for the balanced current distribution were searched, and a simple relationship among them has been found out. Furthermore, a set of the twist pitch angles, which is decided by considering the bending strain tolerance of the superconducting tapes and the flexibility of the cable, has been indicated and discussed.
