Zermeno, Victor M. R.7; Abrahamsen, Asger Bech1; Mijatovic, Nenad3; Jensen, Bogi Bech3; Sørensen, Mads Peter5
1 Department of Wind Energy, Technical University of Denmark2 Wind Energy Systems, Department of Wind Energy, Technical University of Denmark3 Department of Electrical Engineering, Technical University of Denmark4 Center for Electric Power and Energy, Department of Electrical Engineering, Technical University of Denmark5 Department of Applied Mathematics and Computer Science, Technical University of Denmark6 Dynamical Systems, Department of Applied Mathematics and Computer Science, Technical University of Denmark7 Karlsruhe Institute of Technology
A homogenization method to model a stack of second generation High Temperature Superconducting tapes under AC applied transport current or magnetic field has been obtained. The idea is to find an anisotropic bulk equivalent for the stack such that the geometrical layout of the internal alternating structures of insulating, metallic, superconducting, and substrate layers is “washed” out while keeping the overall electromagnetic behavior of the original stack. We disregard assumptions upon the shape of the critical region and use a power law E-J relationship allowing for overcritical current densities to be considered. The method presented here allows for a computational speedup factor of up to 2 orders of magnitude when compared to full 2-D simulations taking into account the actual dimensions of the stacks without compromising accuracy.
Journal of Applied Physics, 2013, Vol 114, Issue 17