Numerical Modelling for AC Loss of the Second Generation HTS Tapes Under Alternating External Magnetic Fields Using the Finite Element Method

Superconductivity is one of the most advanced technologies to use in technical applications especially in electrical engineering applications. This technology is of great interest in R&D stage to fabricate electrical power arraratus because of promising features such as higher efficiency, lower loss, better reliability, smaller size and compact assembly compared with conventional electrical components. The most important properties of high temperature superconducting (HTS) tapes are large current density, high power density and very low AC loss. Yttrium-based second generation HTS tapes have got 100 times higher current density and 20 times higher price compared with conventional copper wires. The most important limitation on application of superconducting technology in power applications is AC loss of the HTS tapes. Many methods have been developed during last decay in order to measure, estimate and calculate the AC loss of the HTS wires. One of the low-cost, fast, and precise approaches is numerical modelling methods. In this paper, a numerical model for yttrium-based second generation HTS tapes has been developed in order to calculate AC loss in transport current mode and under external magnetic fields using the H-formaulation finite element method. The dependency of the current density of tape to magnetic field has been considerd in the model.