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Magneto-Thermal Modeling of Second-Generation HTS for Resistive Fault Current Limiter Design Purposes

Magneto-Thermal Modeling of Second-Generation HTS for Resistive Fault Current Limiter Design Purposes
 
François Roy, Student Member, IEEE, Bertrand Dutoit, 
Francesco Grilli, and Frédéric Sirois, Senior Member, IEEE
 
Abstract - Coated conductors (CCs) are very promising for the design of novel and efficient resistive fault current limiters (FCLs). However, a detailed knowledge about their thermal and electromagnetic behaviors in the presence of over-critical currents is crucial for their improvement. In this context, we performed finite-element magneto-thermal modeling of CCs under over-critical current on several geometries. Accordingly, we have investigated the influence of the physical properties of stabilizer and substrate on the thermal stability to improve the high-temperature superconductor (HTS)-FCL design. All simulations were performed using COMSOL002E Multiphysics, a commercial finite element package, which has a built-in coupling between the thermal and electrical equations, allowing us to compute both quantities simultaneously during the solving process. Our results allow us to determine the current threshold to achieve thermal stability of HTSFCLs made with CCs.
 
Index Terms - COMSOL Multiphysics, fault current limiters (FCLs), finite-element methods (FEMs), high-temperature superconductors (HTS), thin-film devices.
 
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