Publications by Philippe Allenbach

Hydropower Plants Frequency Regulation Depending on Upper Reservoir Water Level

This paper presents a novel method of hydro power plant operation, based on the control of the injectors’ or wicked gates opening time as a function of the upper reservoir level. In this way, a faster power injection, depending on the current water level o ...

2019

Coordination of a Turbo-Generator protections through Power-System Simulation Software SIMSEN

Philippe Allenbach

The correct coordination of the electrical protections of a synchronous generators is a difficult task, especially those based on impedance. Usually, these protections are set according to the recommendations of the main standards and manufacturer guides. ...

Ieee2016

Forced response analysis of hydroelectric systems

François Avellan, Basile Kawkabani, Philippe Allenbach, Christophe Nicolet, Antoine Béguin, Sébastien Alligné, Pedro Camilo de Oliveira e Silva

At off-design operating points, Francis turbines develop cavitation vortex rope in the draft tube which may interact with the hydraulic system. Risk resonance assessment by means of eigenmodes computation of the system is usually performed. However, the sy ...

International Association For Hydraulic Research2014

A fully modular tool for small-signal stability analysis of hydroelectric systems

Basile Kawkabani, Philippe Allenbach, Sébastien Alligné, Pedro Camilo de Oliveira e Silva

In electrical systems, the small-signal stability analysis method is usually applied to synchronous machines by using the Park representation (d, q-components). This paper presents the generalization of a different approach for this method, based on a, b, ...

IEEE2014

HIL Simulation of a Mixed Islanded Power Network with External DSP Regulator

André Hodder, Basile Kawkabani, Philippe Allenbach, Sylvain Robert, Nicolas Junod, György Atilla Bànyai

The present paper deals with the development of a modular, flexible and structured block to block approach for the study of regulators by implementing the different blocks on a DSP (digital signal processor). The proposed low-cost approach has been applied ...

2012

Investigation of control strategies for variable speed pump-turbine units by using a simplified model of the converters

Basile Kawkabani, Alexander Schwery, Jean-Jacques Simond, Philippe Allenbach, Yves Pannatier

Institute of Electrical and Electronics Engineers2010

Influence of the Francis turbine location under vortex rope excitation on the hydraulic system stability

François Avellan, Basile Kawkabani, Jean-Jacques Simond, Philippe Allenbach, Christophe Nicolet, Sébastien Alligné

Hydroelectric power plants are known for their ability to cover variations of the consumption in electrical power networks. In order to follow this changing demand, hydraulic machines are subject to off-design operation. In that case, the swirling flow lea ...

2009

Dynamic Behavior of a 2 Variable Speed Pump-Turbine Power Plant

Basile Kawkabani, Jean-Jacques Simond, Philippe Allenbach, Yves Pannatier

This paper presents the modeling, simulation and analysis of the dynamic behavior of a fictitious 2times320 MW variable speed pump-turbine power plant including hydraulic system, electrical equipments, rotating inertias and control systems using the softwa ...

2008

Pumped Storage Units to Stabilize Mixed Islanded Power Network : A Transient Analysis

François Avellan, Basile Kawkabani, Jean-Jacques Simond, Philippe Allenbach

2008

Influence of the vortex rope location of a Francis Turbine on the hydraulic system stability

François Avellan, Basile Kawkabani, Jean-Jacques Simond, Philippe Allenbach, Christophe Nicolet, Sébastien Alligné

Hydroelectric power plants are known for their ability to cover variations of the consumption in electrical power networks. In order to follow this changing demand, hydraulic machines are subject to off-design operation. In that case, the swirling flow lea ...

International Association For Hydraulic Research2008

Turbine Speed Governor Parameters Validation in Islanded Production

François Avellan, Basile Kawkabani, Jean-Jacques Simond, Philippe Allenbach, Christophe Nicolet, Bob Greiveldinger

The transient behavior of hydroelectric power plants is of high interest for ensuring stability of islanded electrical power networks. Therefore, it is suitable to determine and validate the set of parameters of a turbine speed governor using a realistic s ...

2007

Hardware-in-the-Loop Simulation Software for regulator tests and optimization

Jean-Jacques Simond, Philippe Allenbach, Stefan Keller, Antoine Béguin

This paper presents a real-time extension, called SIMSEN-RT, of the simulation software SIMSEN. SIMSEN-RT allows carrying out hardware-in-the-loop (HIL) simulations of power systems using hardware regulators. It can therefore be used to fine-tune regulator ...

2007

High-Order Modeling of Hydraulic Power Plant in Islanded Power Network

François Avellan, Basile Kawkabani, Jean-Jacques Simond, Philippe Allenbach, Christophe Nicolet, Bob Greiveldinger

Numerical simulations of the transient operation of an islanded power network subject to load rejections are performed. The islanded power network case study consists of a 1-GW hydroelectric power plant featuring four generating units, a long penstock, and ...

IEEE Institute of Electrical and Electronics Engineers2007

Modeling and Numerical Simulation of a Complete Hydroelectric Production Site

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

For many years the EPFL Laboratory for Electrical Machines develops SIMSEN, a numerical software package for the simulation in transient and steady-state conditions of electrical power systems and adjustable speed drives, having an arbitrary topology. SIMS ...

2007

On the Hydroelectric Stability of an Islanded Power Network

François Avellan, Jean-Jacques Simond, Philippe Allenbach

slanded power networks comprising a small number of large power plants are subject to perturbations leading to important transients, and, hence need high performance governors. The design of these governors requires a detailed model of the system. This is ...

2006

On the Hydroelectric Stability of an Islanded Power Network

François Avellan, Jean-Jacques Simond, Philippe Allenbach, Christophe Nicolet, Bob Greiveldinger

Islanded power networks comprising a small number of large power plants are subject to perturbations leading to important transients, and, hence need high performance governors. The design of these governors requires a detailed model of the system. This is ...

2006

Simulation tool linking hydroelectric production sites and electrical networks

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

Since many years the EPFL Laboratory of Electrical Machines develops SIMSEN, a numerical software package for the simulation of electrical power systems and adjustable speed drives, in transient and steady-state conditions, having an arbitrary topology. SI ...

2006

Methodology for Risk Assessment of Part Load Resonance in Francis Turbine Power Plant

François Avellan, Jean-Jacques Simond, Philippe Allenbach, Christophe Nicolet, Bob Greiveldinger

At low flow rate operation, Francis turbines feature a cavitating vortex rope in the draft tube resulting from the swirling flow of the runner outlet. The unsteady pressure field related to the precession of the vortex rope induces plane wave propagating i ...

2006

Issues in Mixed Signal Simulation of Power Drives

Alain Sapin, Jean-Jacques Simond, Philippe Allenbach

This paper descri ...

2002

Modeling of Multi-Windings Phase Shifting Transformers for DC Supplies

Alain Sapin, Jean-Jacques Simond, Philippe Allenbach

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