Publications de François Roy | EPFL Graph Search

Evaluation of the Applicability of Phenomenological HTS Models for Numerical Analysis of Quenches in Coated Conductors: Simulations vs. Experiments

Frédéric Sirois, François Roy, Bertrand Dutoit

The electrical resistivity of coated conductors is strongly related to the inter-dependent set of parameters (J, H, T), respectively current density, magnetic field and temperature. On the one hand, it is difficult to isolate the contribution of each of th ...

2011

Characterization of the electrical resistance of high temperature superconductor coated conductors at high currents using ultra-fast regulated current pulses

Frédéric Sirois, François Roy, Bertrand Dutoit

This paper focuses on the experimental determination of the electrical resistance (R) of commercial high temperature superconductor (HTS) coated conductors (CCs) at currents well above the critical current. The major novelty of this work rests on the uniqu ...

2010

Assessment of the Computational Performances of the Semi-Analytical Method (SAM) for Computing 2-D Current distributions in Superconductors

Frédéric Sirois, François Roy, Bertrand Dutoit

The semi-analytical method (SAM) is a fast integral technique for solving small 2-D, time-transient electromagnetic problems in high temperature superconductors (HTS) with transport current and/or applied field. The method in itself is a generalization of ...

2009

Quench propagation in coated conductors for fault current limiters

Frédéric Sirois, François Roy, Bertrand Dutoit

A fundamental understanding of the quench phenomenon is crucial in the future design and operation of high temperature superconductors based fault current limiters. The key parameter that quantifies the quenching process in superconductors is the normal zo ...

2009

Numerical studies of the quench propagation in coated conductors for Fault Current Limiters

Frédéric Sirois, François Roy, Bertrand Dutoit

A fundamental understanding of the quench phenomenon is crucial in the future design and operation of HTS based Fault Current Limiters (FCLs). The key parameter that quantifies the quenching process in superconductors is the normal zone propagation (NZP) v ...

2009

Comparison Between the Behavior of HTS Thin Film Grown on Sapphire and Coated Conductors for Fault Current Limiter Applications

François Roy, Bertrand Dutoit

The major drawback for the commercialization of fault current limiter (FCL) made of YBCO on sapphire is their expensive price. In the recent years, coated conductors (CC) have been extensively developed and, due to their lower prices, have been recently te ...

Institute of Electrical and Electronics Engineers2009

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

Francesco Grilli, Frédéric Sirois, François Roy, Bertrand Dutoit

Coated conductors 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 th ...

2008

Evaluation of two commercial finite element packages for calculating AC losses in 2-D high temperature superconducting strips

Francesco Grilli, Frédéric Sirois, François Roy, Bertrand Dutoit

This paper compares the speed and accuracy of two commercial packages based on the finite element method (FEM) for calculating the AC losses in high temperature superconductors (HTS). The softwares investigated in this paper were COMSOL Multiphysics and FL ...

2008

Magneto-thermal finite element modeling of 2nd generation HTS for FCL design purposes

Francesco Grilli, Frédéric Sirois, François Roy, Bertrand Dutoit

Coated conductors are very promising for the design of novel and e±cient Fault Current Limiter (FCL). However, before considering using them in a power grid, their thermal and electromagnetic behaviors in the presence of over-critical currents need to be i ...

Iop Publishing Ltd, Dirac House, Temple Back, Bristol Bs1 6Be, England2008

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François Roy

Evaluation of the Applicability of Phenomenological HTS Models for Numerical Analysis of Quenches in Coated Conductors: Simulations vs. Experiments

Modeling and Characterization of Coated Conductors Applied to the Design of Superconducting Fault Current Limiters

Characterization of the electrical resistance of high temperature superconductor coated conductors at high currents using ultra-fast regulated current pulses

Assessment of the Computational Performances of the Semi-Analytical Method (SAM) for Computing 2-D Current distributions in Superconductors

Quench propagation in coated conductors for fault current limiters

Numerical studies of the quench propagation in coated conductors for Fault Current Limiters

Comparison Between the Behavior of HTS Thin Film Grown on Sapphire and Coated Conductors for Fault Current Limiter Applications

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

Evaluation of two commercial finite element packages for calculating AC losses in 2-D high temperature superconducting strips

Magneto-thermal finite element modeling of 2nd generation HTS for FCL design purposes

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Evaluation of the Applicability of Phenomenological HTS Models for Numerical Analysis of Quenches in Coated Conductors: Simulations vs. Experiments

Characterization of the electrical resistance of high temperature superconductor coated conductors at high currents using ultra-fast regulated current pulses

Quench propagation in coated conductors for fault current limiters

Numerical studies of the quench propagation in coated conductors for Fault Current Limiters

Assessment of the Computational Performances of the Semi-Analytical Method (SAM) for Computing 2-D Current distributions in Superconductors

Evaluation of two commercial finite element packages for calculating AC losses in 2-D high temperature superconducting strips

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

Comparison Between the Behavior of HTS Thin Film Grown on Sapphire and Coated Conductors for Fault Current Limiter Applications

Magneto-thermal finite element modeling of 2nd generation HTS for FCL design purposes

Modeling and Characterization of Coated Conductors Applied to the Design of Superconducting Fault Current Limiters