Publications related to Modeling and Numerical Simulation of a Complete Hydrolelectric Production Site

Hydroelectric System Response to Part Load Vortex Rope Excitation

François Avellan, Christophe Nicolet, Christian Landry, Sébastien Alligné, Joao Gomes Pereira Junior, Antoine Béguin

The prediction of pressure and output power fluctuations amplitudes on Francis turbine prototype is a challenge for hydro-equipment industry since it is subjected to guarantees to ensure smooth and reliable operation of the hydro units. The European FP7 re ...

International Association For Hydraulic Research2016

Dynamics of the cavitation precessing vortex rope for Francis turbines at part load operating conditions

Arthur Tristan Favrel

The massive penetration of the existing electrical grid by renewable energy sources requires a continuous extension of the operating range of hydroelectric powerplants, which can lead to cavitation flow instabilities inducing undesirable mechanical vibrati ...

EPFL2016

RANS computations for identification of 1-D cavitation model parameters: application to full load cavitation vortex rope

François Avellan, Christophe Nicolet, Andres Müller, Sébastien Alligné

Due to the massive penetration of alternative renewable energies, hydropower is a key energy conversion technology for stabilizing the electrical power network by using hydraulic machines at off design operating conditions. At full load, the axisymmetric c ...

International Association For Hydraulic Research2016

Energetic Macroscopic Representation (EMR) and control scheme for the asymmetric 4-stage MSBA

Alfred Rufer, Gina Kristin Steinke

The Multistage Stacked Boost Architecture (MSBA) is a non-isolated step-up converter topology intended for renewable energy generation systems or distribution networks. In previous papers the functionality and intended applications for this topology have b ...

2016

Modal Analysis Applied to the Stability Study of Hydroelectric Systems with Modular Structures

Power plants experience distinct dynamic behaviors according to the primary source of energy. Whereas thermal power plants have a slow dynamic, modern renewables such as wind and solar PV are subject to very fast variations, due to environmental factors. T ...

EPFL2015

Kron reduction methods for plug-and-play control of AC islanded microgrids with arbitrary topology

Giancarlo Ferrari Trecate

In this paper, we provide an extension of the scalable algorithm proposed in (Riverso et al., 2015) for the design of Plug-and-Play (PnP) controllers for AC Islanded microGrids (ImGs). The method in (Riverso et al., 2015) assumes DGUs are arranged in a loa ...

2015

Optimally Efficient Multi-Party Fair Exchange and Fair Secure Multi-Party Computation

Handan Kilinç Alper

Multi-party fair exchange (MFE) and fair secure multi-party computation (fair SMPC) are under-studied fields of research, with practical importance. We examine MFE scenarios where every participant has some item, and at the end of the protocol, either ever ...

Springer International Publishing2015

Physical Mechanisms governing Self-Excited Pressure Oscillations in Francis Turbines

Andres Müller

The importance of renewable energy sources for the electrical power supply has grown rapidly in the past decades. Their often unpredictable nature however poses a threat to the stability of the existing electric grid. Hydroelectric powerplants play an impo ...

EPFL2014

Iso-level tool path planning for free-form surfaces

Bailin Deng

The aim of tool path planning is to maximize the efficiency against some given precision criteria. In practice, scallop height should be kept constant to avoid unnecessary cutting, while the tool path should be smooth enough to maintain a high feed rate. H ...

Elsevier2014

Threshold phenomenon for the quintic wave equation in three dimensions

Joachim Krieger

For the critical focusing wave equation

\square u=u^5

on

\mathbb{R}^{3+1}

in the radial case, we establish the role of the “center stable” manifold

\Sigma

constructed in [18] near the ground state

(W,0)

as a threshold between blowup and scattering ...

Springer Verlag2014

Modeling and Numerical Simulation of a Complete Hydrolelectric Production Site

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Hydroelectric System Response to Part Load Vortex Rope Excitation

Dynamics of the cavitation precessing vortex rope for Francis turbines at part load operating conditions

RANS computations for identification of 1-D cavitation model parameters: application to full load cavitation vortex rope

Energetic Macroscopic Representation (EMR) and control scheme for the asymmetric 4-stage MSBA

Modal Analysis Applied to the Stability Study of Hydroelectric Systems with Modular Structures

Kron reduction methods for plug-and-play control of AC islanded microgrids with arbitrary topology

Optimally Efficient Multi-Party Fair Exchange and Fair Secure Multi-Party Computation

Physical Mechanisms governing Self-Excited Pressure Oscillations in Francis Turbines

Iso-level tool path planning for free-form surfaces

Threshold phenomenon for the quintic wave equation in three dimensions

Hydroelectric System Response to Part Load Vortex Rope Excitation

Optimally Efficient Multi-Party Fair Exchange and Fair Secure Multi-Party Computation

RANS computations for identification of 1-D cavitation model parameters: application to full load cavitation vortex rope

Energetic Macroscopic Representation (EMR) and control scheme for the asymmetric 4-stage MSBA

Dynamics of the cavitation precessing vortex rope for Francis turbines at part load operating conditions

Kron reduction methods for plug-and-play control of AC islanded microgrids with arbitrary topology

Modal Analysis Applied to the Stability Study of Hydroelectric Systems with Modular Structures

Physical Mechanisms governing Self-Excited Pressure Oscillations in Francis Turbines

Iso-level tool path planning for free-form surfaces

Threshold phenomenon for the quintic wave equation in three dimensions