Concept

Harmonique (électricité)

Publications associées (108)

Control of the frequency spectrum with the help of open loop and closed loop algorithms in active filters

This paper proposes two frequency based methods for parallel active filtering of current harmonics in utility grids. Active Filter (AF) reference prediction and AF current control are the two key-points to obtain high performances. This paper deals with th ...

2002

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

Implementation of a lowcost sinusoidal supply for BLDC motor

Yves Perriard, Frédéric Bonvin

In many applications, industry has tried to develop sinusoidal supply for brushless DC (BLDC) motors. This paper describes a method that still keeps a simple 2 phases-on sensorless method and achieves sinusoidal supply, which is needed to avoid speed oscil ...

EPE Assoc2001

BLDC motor control in multiple dq axes

Yves Perriard, Frédéric Bonvin

With brushless DC Motor (BLDC), current regulators in dq axes are very appreciated for sinusoidal supply. As the set current is constant, the regulator works properly. When the back-EMF is not sinusoidal, current oscillations appear in the dq regulator. A ...

Institution of Electrical Engineers2000

Non‐linear behaviour of the pulsating white dwarf G29‐38 – II. Analysis of the phase spectrum

François Richard Vuille

An analysis of the phase spectrum of the DA pulsating white dwarf G29–38 over many seasons has been performed. This complements a companion paper which analyses the evolution of the temporal spectrum of G29–38. We show that, with one exception, the rela ...

2000

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

Modeling of Multi-Windings Phase Shifting Transformers for DC Supplies.

Jean-Jacques Simond, Philippe Allenbach, Alain Sapin

This paper deals with the modeling of multi-windings transformers. Based on a real example, a modeling methodology is presented. This methodology is the original part of the paper. Application examples of multi-windings phase shifting transformers (18 and ...

2000

Parameter Design of a state-variable controller for PWM Voltage Source converters connected to the grid

Alfred Rufer

Controlled pulse-width modulated (PWM) voltage source converters (VSC’s) are increasingly used in power systems for active filtering of line current harmonics and reactive power compensation. In this paper the parameter design of a state variable controlle ...

1999

Development of a high-power THz radiation source for plasma diagnostics

Jean-Philippe Hogge, Markus Siegrist

A high power radiation source in the THz range with long pulse and narrow line width is required for diagnosing fusion type plasmas by collective Thomson scattering. Gyrotrons currently meet the requirements concerning power, pulse length and line width wh ...

1999

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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