Concept

Electric power system

Related publications (317)

Investigation and comparison between classical and state-space control for the entry VSI of a frequency converter.

Jean-Jacques Simond, André Hodder, Alain Sapin

Nowadays, multilevel VSIs (Voltage Source Inverter) begin to be widely used in middle and high power installations such as variable speed drives, FACTS (Flexible AC Transmission System) and windformers for example. In these systems, 2 VSIs are put back to ...

2002

New Tool for the Simulation of Transient Phenomena in Francis Turbine Power Plants.

François Avellan, Jean-Jacques Simond, Philippe Allenbach, Alain Sapin

An analytical approach allowing modelling transient phenomena in pipes, valves, surge tanks and Francis turbines based on impedance method is developed. These models are implemented in a software called “SIMSEN”, which simulates the behaviour of complex ap ...

2002

New Tools for the Simulation of Transient Phenomena in Francis Turbine Power Plants

François Avellan, Jean-Jacques Simond, Christophe Nicolet, Philippe Allenbach, Alain Sapin

International Association For Hydraulic Research2002

Unified power quality conditioner based on current source converter topology

Alfred Rufer

Nonlinear devices, such as power electronics converters, inject harmonic currents in the AC system and increase overall reactive power demanded by the equivalent load. Also, the number of sensitive loads that require ideal sinusoidal supply voltages for th ...

2001

Investigation of the 3-Level Unified Power Flow Controller (UPFC)

Jean-Jacques Simond, Philippe Allenbach, Alain Sapin

Flexible AC Transmission Systems (FACTS) are systems based on power electronics using GTO or IGCT semiconductors [1] that allow a better use of the transfer capacities of the transmission lines and permit to satisfy the requirements due to the liberalizati ...

2001

TLSim: A software for Electrical Public Transportation Systems

Jean-Jacques Simond, Philippe Allenbach, Roland Wetter

The Laboratory of Electrical Machines of the Swiss Federal Institute of Technology (Lausanne) has developed a software (TLSim) for the simulation of electrical urban transportation systems. This program can simulate the behaviour of the power supply networ ...

2001

Technical and Economical Assessment of HTS Cables

Marten Sjöström

Besides the option of HTS cables as retrofit elements in densely populated areas, the technically most attractive aspect of HTS is the possibility of high power transmission at reduced voltage. In this paper we concentrate on this second aspect. High power ...

2001

Staircase-free finite-difference time-domain formulation for general materials in complex geometries

Jan Sickmann Hesthaven

A stable Cartesian grid staircase-free finite-difference time-domain formulation for arbitrary material distributions in general geometries is introduced. It is shown that the method exhibits higher accuracy than the classical Yee scheme for complex geomet ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2001

Transmission électromagnétique rotative d'énergie et d'information sans contact

The transmission of energy or signals to a rotating device is generally carried out by systems with sliding contacts. This technology, apparently simple, generates serious nuisance such as abrasion of the elements in contact, electric noises and requires a ...

EPFL2000

EMC problems connected to the use of the low voltage power network for information transmission

Michel Ianoz

The Commission E Open Meetings papers are a choice between a status report for the Working Group activity or a short presentation of a subject in the area of the respective WG, which seems more relevant for the period between two such Open Meetings. The di ...

2000

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