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Bertrand Dutoit

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Related publications (44)

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Resistivity of REBCO tapes in overcritical current regime: impact on superconducting fault current limiter modeling

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli, Frédéric Sirois, Nicolo' Riva

A detailed knowledge of the resistivity of high-temperature superconductors in the overcritical current regime is important to achieve reliable numerical simulations of applications such as superconducting fault current limiters. We have previously shown t ...

IOP Publishing Ltd2020

Feasibility Study of GaToroid Gantries for Carbon Ions

Bertrand Dutoit, Bertrand Dutoit, Enrico Felcini

The use of carbon ions in particle therapy can enhance the treatment quality, introducing higher biological effectiveness compared to photons and protons. Rotating gantries are nowadays used to deliver particle beams from different directions to obtain pre ...

IEEE Institute of Electrical and Electronics Engineers2022

Fast Hotspot Detection in SFCLs by Exploiting Strain Response in Optical Fiber Sensing

Luc Thévenaz, Bertrand Dutoit, Zhisheng Yang, Bertrand Dutoit, Nicolo' Riva, Arooj Akbar

Superconducting fault current limiters (SFCLs) can be used to limit fault currents in both meshed DC and AC grids by transitioning from superconducting to resistive state, in the presence of high currents. While the device is theoretically a great way to p ...

IEEE Institute of Electrical and Electronics Engineers2021

Parameterized hysteresis model for high-temperature superconductors

Bertrand Dutoit, Bertrand Dutoit, Marten Sjöström

High-temperature superconductors (HTS) exhibit hysteresis, which is the main cause for losses in the subcritical domain. This behavior is well predicted by Bean's critical-state model, which is a subset of the classical Preisach model. We present a paramet ...

IEEE Institute of Electrical and Electronics Engineers2000

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

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

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

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

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

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 ...

IOP Publishing Ltd2005

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

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

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

Comparison of Numerical Methods for Modelling of Superconductors

Bertrand Dutoit, Bertrand Dutoit, Francesco Grilli

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

Inhomogeneity effects in HTS coated conductors used as resistive FCLs in medium voltage grids

Bertrand Dutoit, Bertrand Dutoit, Daniele Colangelo

For resistive fault current limiters (RFCLs) based on high temperature superconducting coated conductors (HTS-CCs), inhomogeneity, in terms of critical current and geometrical imperfections such as stabilizer and substrate thicknesses, plays a very importa ...

IOP Publishing Ltd2012

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

Design and Production of the ECCOFLOW Resistive Fault Current Limiter

Bertrand Dutoit, Bertrand Dutoit

The European project ECCOFLOW aims at a versatile resistive-type superconducting fault current limiter. For the first time, such a device will be tested at two different sites. The project partners have developed a superconducting fault current limiter des ...

IEEE Institute of Electrical and Electronics Engineers2013

Impact of the Normal Zone Propagations Velocity of High Temperature Superconducting Coated Conductors on Resistive Fault Current Limiters

Bertrand Dutoit, Bertrand Dutoit, Daniele Colangelo

The engineering critical current (Ic) of the high temperature superconducting coated conductors (HTS-CCs), today available on the market, is not a uniform parameter and varies significantly along the length of the conductors. Moreover, commercial HTS-CCs h ...

IEEE Institute of Electrical and Electronics Engineers2015

Quench propagation in coated conductors for fault current limiters

Bertrand Dutoit, Bertrand Dutoit, Frédéric Sirois, François Roy

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

A series of round-robin measurements of the self-field ac loss of Bi-2223 tapes

Bertrand Dutoit, Bertrand Dutoit

A round-robin of self-field ac loss measurements on Bi-2223 tapes has been performed for the first time, under the Brite EuRam research programme SACPA. Excellent agreement on loss data has been obtained by the four measurement partners. This further confi ...

IOP Publishing Ltd1998

Experimental study of the geometrical barrier in type-I superconducting strips

Bertrand Dutoit, Bertrand Dutoit

We study the energy barrier for flux entry of a geometric origin in type-I superconducting strips using magneto-optical observations of the flux structure. The magnetic field is applied perpendicularly to the broad surface and, optionally, a dc current is ...

1999

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

Optical fibre sensing for fast hotspot detection in SFCLs

Luc Thévenaz, Bertrand Dutoit, Zhisheng Yang, Bertrand Dutoit, Sheng Wang, Arooj Akbar

The health monitoring of superconducting fault current limiters (SFCL) is important for their large-scale exploitation in HVDC grids protection. The intrinsic non-homogeneity of critical current along the superconductor length can cause localized points of ...

IOP Publishing Ltd2020

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

Bertrand Dutoit, Bertrand Dutoit, Frédéric Sirois, François Roy

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