2D Magneto-Thermal Modeling of Coated High-Temperature Superconductors

F. Roy1, B. Dutoit1, F. Sirois2, and F. Grilli3
1École polytechnique fédérale de Lausanne, Lausanne, Switzerland
2Éole polytechnique de Montréal, Montréal, Canada
3F. Grilli, Los Alamos National Laboratory, Los Alamos, NM, USA

Thin films are very promising for the design of novel and an efficient Fault Current Limiter (FCL) made of high-temperature superconductors (HTS). However, before considering the use of these in a power grid, their thermal and highly non-linear electromagnetic behavior in the presence of over-critical currents needs to be investigated in detail.

In this paper, we propose a numerical approach to solve magneto-thermal models for geometries of high aspect ratio. The used electromagnetic formulation inspired from the work of Brambilla et al., were performed in 2D using COMSOL Multiphysics.

Furthermore, the thermal part of our model has been implemented to consider the thermal exchange with the nitrogen bath needed for HTS-FCL operation.