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Publications associées (53)

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

Francesco Grilli, Joseph Duron, Bertrand Dutoit

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

Effect of current distribution on the voltage-temperature characteristics: study of the NbTiPF-FSJS sample for ITER

Boris Stepanov

Various tests, either on full-size joint samples or on model coils confirmed that current distribution may play a crucial role in the electrical behaviour of CICC in operating conditions. In order to evaluate its influence, CEA developed a code (ENSIC) the ...

2004

Prediction of resistive and hysteretic losses in a multi-layer high-Tc superconducting cable

Francesco Grilli, Marten Sjöström

In this work, a model of a multi-layer high-Tc superconducting (HTS) cable that computes the current distribution across layers as well as the AC loss is presented. Analyzed is the case of a four-layer cable, but the developed method can be applied to a ca ...

2004

Finite Element Method Modelling of Superconductors: from 2D to 3D

Francesco Grilli, Bertrand Dutoit

A 3D numerical modelling technique for solving problems involving superconducting materials is presented. The model is implemented in finite element method software and is based on a recently developed 3D formulation for general electro-magnetic problems w ...

2004

Electromagnetic field radiated by lightning to tall towers: treatment of the discontinuity at the return stroke wave front

Marcos Rubinstein, Davide Pavanello, José-Luis Bermudez

Recently, engineering return stroke models were extended to take into account the presence of an elevated strike object, which was modeled as an ideal uniform transmission line. We show in this paper that the current distribution associated with these exte ...

2004

Self field measurements by hall sensors on the SeCRETS short sample CICC's subjected to cyclic load

Pierluigi Bruzzone

An imbalance in the transport current among the strands of a Cable-in-Conduit conductors (CICC) can be associated with the change of their performance. In order to understand and improve the performance of CICC's, it is essential to study the current imbal ...

2003

Electromagnetic field associated with lightning return strokes to a tall structure: influence of channel geometry

José-Luis Bermudez

The paper is a contribution to the studies of factors that can affect electric (E) and magnetic (H) fields associated with lightning return strokes to tall structure. Herein, the influence of lightning channel inclination upon vertical E-field and azimutha ...

2003

Application of the code THEA to the CONDOPT experiment in SULTAN

Pierluigi Bruzzone, Luca Bottura

The CONDOPT (CONDuctor OPTimization) experiment has been recently completed in SULTAN. The current sharing behavior of Nb-3 Sn samples was assessed as a function of the number of cyclic loads experienced during current sweeps in a 10 T background field. We ...

2002

Software for transient electromagnetic field in GIS and its applications

Michel Ianoz

Due to the turning on or off operation of the circuit breakers and the disconnected switches, a strong electromagnetic interference in gas-insulated substations (GIS) is commonly generated. The transient wave process with a very wide frequency range can ge ...

2002

Prediction of switching transient electromagnetic fields in gas-insulated substations

Michel Ianoz

Due to the opening or closing operation of circuit breakers and disconnected switches in gas-insulated substations (GIS), a very strong transient wave process can be generated along the three-phase transmission system and transient electromagnetic field ca ...

2002

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