Concept

Protective relay

Publications associées (67)

Lightning-correlated faults in power distribution networks

The paper deals with the correlation between lightning and distribution networks faults and/or voltage dips. In particular, the paper presents an application of a method proposed by the authors to correlate lightning events and relays operations based on t ...

2007

Results of contact resistance distribution in ITER size conductor termination

Pierluigi Bruzzone, Martin Vogel

JORDI (JOint Resistance DIstribution), a dedicated test facility for the measurement of contact resistance distribution in full-size, ITER type conductor terminations, has been successfully commissioned at CRPP. In contrast to earlier attempts, where the c ...

2006

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

Francesco Grilli, Joseph Duron, Bertrand Dutoit

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 ...

2005

Lightning-Induced Voltages on Overhead Distribution Lines: Theoretical and Experimental Investigation of Related Problems and their Impact on Power Quality

Mario Paolone, Carlo Alberto Nucci

Recent power quality studies have been focused on the source-identification of voltage disturbances at distribution network busses. This paper describes a method aimed at correlating indirect-lightning events with power systems relay operations, associated ...

2004

JORDI, a test facility for measurement of contact resistance distribution in full-size conductor terminations

Pierluigi Bruzzone

A new test facility, dedicated to the measurement of contact resistance distribution in full-size conductor termination, has been designed and manufactured at CRPP Fusion Technology in Villigen, Switzerland. The facility will be used to characterize and qu ...

2004

Technical and Economical Impacts on a Power System by Introducing an HTS FCL

Marten Sjöström

Fault current limiters (FCLs) can be considered as key elements in power systems using high temperature superconductors. This analysis takes into account the system benefits provided by the introduction of FCLs in various network configurations. New meshin ...

2001

Modeling of Multi-winding Phase Shifting Transformers : Application to DC and Multi-level VSI Supplies.

Jean-Jacques Simond, Philippe Allenbach, Alain Sapin

This paper deals with the modeling of multi-winding transformers. Based on the real example of a railway DC - supply, a modeling methodology is presented as the original part of the paper. Afterwards two application examples of multi-winding phase shifting ...

2000

Enhancement of power system transient stability using superconducting fault current limiters

Bertrand Dutoit, Marten Sjöström

Transient stability investigations consist of studying the rotor oscillations of generators (electro-mechanic oscillations, 0.1-2 Hz) after the occurrence of a fault of large amplitude, e.g. short circuit. The goal is to indicate if the generators are capa ...

1999

Conducting barrier electrodes for direct contact of PZT thin films on tungsten

Nava Setter, Paul Muralt, Thomas Maeder

Two W protection schemes for direct-contact bottom electrodes for PZT thin films, namely RuO2/Cr and RuO2/Ru, were compared with respect to protective performance and contact resistance up to 800 degrees C annealing temperature in oxygen. Cr clearly offers ...

1998

Simulation of the transient response of a high-Tc superconducting current limiter inserted in an electrical distribution system

Bertrand Dutoit

The ever-increasing demand for electrical power leads to reinforced power systems. Therefore, the overcurrents resulting from contingencies such as short-circuits are increasingly higher. In order to reduce these overcurrents, a protection system composed ...

1997

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