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Bertrand Dutoit

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Publications associées (45)

MV Power Grids Integration of a Resistive Fault Current Limiter Based on HTS-CCs

Bertrand Dutoit, Bertrand Dutoit, Daniele Colangelo

Due to the energy demand growth and distributed generation (DG) units penetration, a substantial increase of the rated short-circuit current of the electrical lines is expected. As a consequence, the electrical grid infrastructure needs to be extended or d ...

IEEE Institute of Electrical and Electronics Engineers2012

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

Bertrand Dutoit, Bertrand Dutoit, François Roy, Frédéric Sirois

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 ...

IEEE Institute of Electrical and Electronics Engineers2011

Impact of Inhomogeneities in HTS Coated Conductors for Resistive FCLs

Bertrand Dutoit, Bertrand Dutoit, Frédéric Sirois, Daniele Colangelo

Several issues remain to be addressed for the commercial development of ResistiveFault Current Limiters based on superconducting technologies (RFCL). In particular, the inhomogeneity of high temperature superconducting coated conductors (HTS-CC) combined w ...

Elsevier Science Bv2011

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

Bertrand Dutoit, Bertrand Dutoit, François Roy, Frédéric Sirois

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 ...

IEEE Institute of Electrical and Electronics Engineers2009

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

Bertrand Dutoit, Bertrand Dutoit, François Roy, Frédéric Sirois

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 ...

IEEE Institute of Electrical and Electronics Engineers2009

Quench propagation in coated conductors for fault current limiters

Bertrand Dutoit, Bertrand Dutoit, François Roy, Frédéric Sirois

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 ...

Elsevier2009

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

Bertrand Dutoit, Bertrand Dutoit, François Roy

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 ...

IEEE Institute of Electrical and Electronics Engineers2009

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

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli, François Roy, Frédéric Sirois

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

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

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli, François Roy, Frédéric Sirois

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 ...

IEEE Institute of Electrical and Electronics Engineers2008

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

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli, François Roy, Frédéric Sirois

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

Finite-element modelling of YBCO fault current limiter with temperature dependent parameters

Bertrand Dutoit, Bertrand Dutoit, Joseph Duron, Francesco Grilli

In this paper we present a numerical model in which both the thermal and the electromagnetic aspects of the over-critical current regime of HTS materials are taken into account. The electromagnetic and thermal equations have been implemented in finite elem ...

2007

Thermally Assisted Transition in Thin Film Based FCL: A Way to Speed Up the Normal Transition Across the Wafer

Bertrand Dutoit, Bertrand Dutoit, Joseph Duron

The adjunction of constrictions along the meander of a superconducting Fault Current Limiter (FCL) greatly improves its behavior thanks to a better distribution of the dissipative zones at the occurrence of a short circuit. This design works perfectly for ...

IEEE Institute of Electrical and Electronics Engineers2007

Computer Modeling of YBCO Fault Current Limiter Strips Lines in Over-Critical Regime With Temperature Dependent Parameters

Bertrand Dutoit, Bertrand Dutoit, Joseph Duron, Francesco Grilli

We present the results of an advanced numerical model for fault current limiter (FCL) based on HTS thin films in which both thermal and electromagnetic aspects are taken into account. This model allows simulating the behavior of FCL in the over-critical cu ...

IEEE Institute of Electrical and Electronics Engineers2007

Finite-element modelling of superconductors in over-critical regime with temperature dependent resistivity

Bertrand Dutoit, Bertrand Dutoit, Joseph Duron, Francesco Grilli

In this paper, we present a new numerical model, in which both the thermal and the electromagnetic aspects of the over-critical current regime of HTS materials are taken into account. The electromagnetic and thermal equations have been implemented in finit ...

Institute of Physics Publishing2006

Finite-element analysis and comparison of the AC loss performance of BSCCO and YBCO conductors

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli

The AC loss performance of two BSCCO and two YBCO conductors of different geometry, characterized by the same self-field critical current of 150 A, is analysed and compared quantitatively. The comparison is made using the finite-element method with a non-l ...

Instutute of Physics Publishing2006

Dynamic field mapping for obtaining the current distribution in high-temperature superconducting tapes

Bertrand Dutoit, Bertrand Dutoit, Joseph Duron, Francesco Grilli

The magnetic field profile on the surface of Bi-2223/Ag tapes has been dynamically measured across the width of the samples. The experimental technique uses a Hall-probe array with 7 sensors connected to a multiple channel lock-in amplifier especially prog ...

2005

Comparison of the AC losses of BSCCO and YBCO conductors by means of numerical analysis

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli

This paper presents a quantitative comparison of the AC loss performance of two BSCCO and two YBCO conductors, characterized by the same self-field critical current of 150 A. In particular, compared are a 37-filamentary BSCCO tape, a 16-filamentary BSCCO s ...

2005

Analysis of magnetic field and geometry effects in the design of HTS devices for AC power applications

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli

The performance of HTS devices is strongly influenced by local values of the current/field distributions. In this paper, we investigate the influence of the magnetic field and of the geometrical configuration on the loss behaviour of a 200kVA FCL prototype ...

2005

3D Finite Element Simulations of strip lines of a YBCO/Au Fault Current Limiter

Bertrand Dutoit, Bertrand Dutoit, Joseph Duron, Francesco Grilli

Geometrical aspects of the design of fault current limiters (FCL) have a great impact on their performance. Recently, the University of Geneva have presented optimized geometries obtained by splitting the FCL into many small dissipative lengths in order to ...

IEEE Institute of Electrical and Electronics Engineers2005

Comparison of Numerical Methods for Modelling of Superconductors

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli, Yong Yang

Different FEM formulations have been developed in order to model the electromagnetic behaviour of type II super-conductors. The paper presents a comparison between simulations with A-V formulation models implemented in two FEM software packages (FLUX2D and ...

Institute of Electrical and Electronics Engineers2002

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