Concept

Fault current limiter

Related publications (93)

Upper critical fields well above 100 T for the superconductor SmFeAsO0.85F0.15 with T-c=46 K

We report specific-heat measurements at magnetic fields up to 20 T on the recently discovered superconductor SmFeAsO0.85F0.15. The B-T diagram of a polycrystalline SmFeAsO0.85F0.15 sample with T-c=46 K was investigated. The temperature dependence of B-c2 w ...

2008

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

Francesco Grilli, Joseph Duron, Bertrand Dutoit

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 ...

2007

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

Francesco Grilli, Joseph Duron, Bertrand Dutoit

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

Joseph Duron, Bertrand Dutoit

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 ...

2007

2D Magneto-Thermal Modeling of Coated High-Temperature Superconductors

Francesco Grilli, Frédéric Sirois, François Roy, Bertrand Dutoit

Thin films are very promising for the design of novel and efficient Fault Current Limiter (FCL) made of high-temperature superconductors (HTS). However, their thermal and highly non-linear electromagnetic behavior in the presence of over-critical currents ...

COMSOL France2007

70 kA high temperature superconductor current lead operation at 80 K

Rainer Wesche

For the superconducting magnet system of the International Thermonuclear Experimental Reactor, ITER, 60 current leads for a total current of more than 2500 kA are needed. To reduce the resultant large refrigerator load at 4.5 K, High Temperature Supercondu ...

2006

Modélisation de matériaux supraconducteurs

Joseph Duron

This thesis is focused on the modelling of superconducting materials, and in particular, high-temperature superconducting materials. This work is divided in two parts: first, the dynamic magnetic field mapping obtained by measurements is used in order to r ...

EPFL2006

Thermoelectrical study of ferromagnetic nanowire structures

Jean-Philippe Ansermet, Santiago Serrano Guisan

The mixed effects of heat and charge transports have been studied at room temperature for NiCu and CoCu multilayers with currents perpendicular to the interfaces as well as Ni and Co homogeneous nanowires. In order to carry out this analysis, magnetothermo ...

American Institute of Physics2006

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

Francesco Grilli, Bertrand Dutoit

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

Modelling the E-J relation of high-Tc superconductors in an arbitrary current range

Francesco Grilli, Joseph Duron, Bertrand Dutoit

For describing the E-J relation of high-Tc superconductors (HTS) in power applications, where the applied current I is generally limited by Ic, the critical state model, a piecewise linear generalization, or a simple power-law of the type E=Ec(J/Jc)^n are ...

2004

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