AC LOSS OF A HIGH-T-C SUPERCONDUCTING POWER-CABLE CONDUCTOR

We investigate the AC loss of a high-T-c superconducting power-cable c onductor with four layers and interlayer insulation. The electric-circ uit model is applied for the calculation of the AC loss of the conduct or. The result of a calculation for the BC loss shows that the calcula ted value is nearly equal to the experimental value; therefore this mo del explains the electromagnetic properly of the conductor well. Moreo ver the result of a calculation for the current distribution of the co nductor indicates that almost all the current passes through the outer layer when the transport current is less than the I-c of the conducto r. Finally we calculate the relation between AC loss and the spiral pi tch of the high-T-c superconducting wires which make up the conductor. It is found that the AC loss is markedly decreased when the spiral pi tch is less than 0.5 m.