Concept

Harmonique (électricité)

Publications associées (29)

Method for estimating synchrophasors during static and dynamic conditions

Mario Paolone, Asja Derviskadic, Paolo Romano

A method for performing synchrophasor estimation of an input signal, whereby the input signal is a sinusoidal power system voltage or current signal, comprising: a. Periodic sampling of a continuous time-domain waveform, consisting of a power system voltag ...

2018

Switched-capacitor high-speed emulator for real-time fault location in electrical power systems

Maher Kayal, François Krummenacher, François Pierre Gaugaz

This research presents a discrete-time transmission line model based on the propagation of travelling waves. In this approach, the transmission line is emulated by means of many interconnected unit delay cells implemented with switched-capacitor (SC) circu ...

SPRINGER2018

Experimental investigation of the sloshing motion of the water free surface in the draft tube of a Francis turbine operating in synchronous condenser mode

François Avellan, Arthur Tristan Favrel, Loïc Andolfatto, Elena Vagnoni

Hydropower units may be required to operate in condenser mode to supply reactive power. In this operating mode, the water level in the turbine or pump-turbine is decreased below the runner by closing the guide vanes and injecting pressurized air. While ope ...

2018

Light Confinement and Nonlinear Light-Matter Interaction in Semiconductor Photonic Crystal Cavities

Mohamed Sabry Abdel-Aliem Mohamed

The ability to control and manipulate light is a fundamental aspect that is at the very core of the development of integrated photonic circuits. It is desirable to achieve such control down to a scale that is comparable to or smaller than the wavelength of ...

EPFL2018

Harmonic current prediction by impedance modeling of grid-tied inverters: A 1.4 MW PV plant case study

Grid-tied inverters are the main responsible for the successful integration of photovoltaic (PV) plants in the power grid. Two important challenges are the integration of power plants based-inverters and their contribution to the power system quality. This ...

Elsevier Sci Ltd2017

A System and Method for Dispatching an Operation with Heterogeneous Prosumers

Mario Paolone, Fabrizio Sossan, Emil Namor

A method for dispatching an operation of a distribution feeder of electrical power into a grid with heterogeneous prosumers, the method comprising the steps of establishing a dispatch plan on a computer by using forecast data of an aggregated consumption a ...

2017

Fluid-structure interaction mechanisms leading to dangerous power swings in Francis turbines at full load

François Avellan, Arthur Tristan Favrel, Christian Landry

Hydropower plants play an important regulatory role in the large scale integration of volatile renewable energy sources into the existing power grid. This duty however requires a continuous extension of their operating range, provoking the emergence of com ...

Elsevier2017

Modelling Hysteresis of Soft Core Materials using Permeance-Capacitance Analogy for Transient Circuit Simulations

Drazen Dujic, Min Luo

Magnetic components using soft core materials are widely used in power electronic converters. The hysteresis effect of the material leads to power loss and harmonic distortion. If this effect can be modelled in system-level time-domain simulation, the perf ...

Ieee2017

Experimental investigation of the mass flow gain factor in a draft tube with cavitation vortex rope

François Avellan, Arthur Tristan Favrel, Christian Landry, Andres Müller, Sébastien Alligné, Keita Yamamoto

At off-design operating operations, cavitating flow is often observed in hydraulic machines. The presence of a cavitation vortex rope may induce draft tube surge and electrical power swings at part load and full load operations. The stability analysis of t ...

2017