Coupled Magnetodynamic and Electric Circuit Models for Superconducting Fault Current Limiter

TL;DRAbstract

Finite element models, which include the shielding characteristics of superconductors are often complex and would currently not allow to study three dimensional models of devices of complex geometry such as fault current limiters. The authors propose instead a model based on variable electric conductivity, which is suitable to simulate magnetic field characteristics of inductive superconducting fault current limiters. It also enables such simulations to be combined with an electric circuit model. A benchtop demonstration module of an inductive superconducting fault current limiter has been dimensioned and optimized by a coupled magnetodynamic and electric circuit model. Based on this model, this fault current limiter was built for model validation and refinement as well as for additional laboratory experiments. The results from the simulation model exhibited good agreement with the measurements in the laboratory.

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