Modeling of the magnetic field diffusion in the high-Tc superconducting tube for fault current limitation

Operation of the superconducting fault current limiter of the inductive type is analyzed together with the magnetic diffusion process that occurs in the high-T-c superconducting tube. Due to the highly non-linear voltage-current relation of the superconductor, a critical state model based on the power law is used to compute resistivity changes during transition from the superconducting state to the resistive state. The influence of the penetration depth, for various operating modes, on the magnetic flux density distribution across the SC tube wall is investigated using the slab geometry and a linear approximation of the magnetic diffusion process. (C) 2003 Elsevier Science B.V. All rights reserved.