Improved Calculation of Magnetic Hysteresis Loss of Stacked Superconducting Cable Under T-A Formulation

The second generation of high-temperature superconductor (HTS)REBCO has been widely used in a variety of electrical equipment due to its excellent current carrying properties and commercial manufacturing technology development. Most HTS-based superconducting power devices need to operate under alternating magnetic fields or alternating currents. Therefore, the influence of magnetic loss must be taken into account in the design process to ensure the operation stability and safety. In order to analyze the magnetic loss of superconductor, 2D and 3D Twisted Stacked-Tapes Cable (TSTC) models are both established based on T-A formulation. Because the 3D model has the problem of long calculation time, a parametric scanning method is proposed to reduce the deviation of hysteresis loss numerical simulation between 2D model and 3D model under alternating magnetic field. On the premise that the number of meshed elements remains the same, the calculation accuracy can be further improved by reducing the scan step length to ensure the consistency of the 2D model and the 3D model. The results show that when the scanning step is 40°, the deviation of the 2D model results from the 3D model results is about 5%, but the calculation time is less than half of the 3D model.