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Jean-Jacques Simond

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Publications associées (60)

A Novel Air-Gap Monitoring System For Large Low Speed Hydro-Generators

Jean-Jacques Simond, Mai Tu Xuan, Roland Wetter, Stefan Keller

This paper describes a novel and patented air-gap monitoring system for large low speed synchronous hydro-generators. This new system is based on inductive sensors, it is able to measure in real time a static or a dynamic rotor eccentricity, a stator or a ...

2006

An Original Inductive Air-Gap Monitoring System for Large Low Speed Hydro-Generators

Jean-Jacques Simond, Mai Tu Xuan, Roland Wetter, Stefan Keller

2006

Improved Modeling of Three-Phase Transformer Analysis Based on Nonlinear B-H Curve and Taking Into Account Zero-sequence Flux

Basile Kawkabani, Jean-Jacques Simond

The present paper deals with a new approach for the study of the steady - state and transient behaviour of three- phase transformers. This approach based on magnetic equivalent circuit diagrams, takes into account the nonlinear B-H curve as well as zero-se ...

2006

Improved Modeling of Three-Phase Transformer Analysis Based on Magnetic Equivalent Circuit Diagrams And Taking Into Account Nonlinear B-H Curve

Basile Kawkabani, Jean-Jacques Simond

The present paper deals with a new approach for the study of the steady-state and transient behaviour of phase transformers. This approach based on magnetic equivalent circuit diagrams, takes into account the nonlinear B-H curves as well as zero-sequence f ...

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

On the Identification of the Synchronous Machine Parameters Using Standstill DC Decay Test

Jean-Jacques Simond, Mai Tu Xuan, Roland Wetter

This paper presents a refined approach to obtain the parameters of synchronous machine equivalent circuits from standstill DC decay tests. A dedicated program for the time- constants and reactances identification was developed and applied for both d- and q ...

2006

Improved modeling of three-phase transformer analysis based on magnetic equivalent circuit diagrams and taking into account nonlinear B-H curve

Basile Kawkabani, Jean-Jacques Simond

The present paper deals with a new approach for the study of the steady - state and transient behaviour of three-phase transformers. This approach based on magnetic equivalent circuit diagrams, takes into account the nonlinear B-H curve as well as zero-seq ...

2005

Unbalanced DC-link voltage regulation in a back-to-back 3-level PWM converter for a doubly-fed induction motor/generator

André Hodder, Alexander Schwery, Jean-Jacques Simond

An unbalanced DC-link voltage regulation strategy is proposed for a three-level voltage source inverter used in the rotor cascade of a double-fed asynchronous motor-generator. The major problem in determining the presence of the unbalanced component is inv ...

2005

Prediction of the No-Load Voltage Waveform of Laminated Salient-Pole Synchronous Generators

Jean-Jacques Simond, Mai Tu Xuan, Stefan Keller

This paper presents a combined analytical and FEM method for prediction of the no-load voltage waveform of laminated salient-pole synchronous generators. The described method takes into account saturation effects as well as the damper bar currents due to t ...

2005

Synchronous Generator No-Load Voltage Prediction using a Combined Analytical and FEM Approach

Jean-Jacques Simond, Mai Tu Xuan, Stefan Keller

A combined analytical and FEM method for prediction of the no-load voltage waveform of laminated salient pole synchronous generators is presented in this article. Very precise prediction of the no-load voltage, including saturation effects as well as the e ...

2005

12-Pulse LCI Synchronous Drive for a 20 MW Compressor - Modeling, Simulation and Measurements

Alain Sapin, Jean-Jacques Simond, Mai Tu Xuan, Roland Wetter

The current source thyristor inverter is still today a suitable choice for supplying high power adjustable speed drives for pumps or compressors. This paper presents a 12-pulse LCI (load commutated inverter) synchronous drive for a 20 MW compressor, it foc ...

2005

Issues in Mixed Signal Simulation of Power Drives

Alain Sapin, Jean-Jacques Simond, Philippe Allenbach

This paper descri ...

2002

20 MW Compressor LCI Drive: Modeling, Simulation and Measurements

Alain Sapin, Jean-Jacques Simond, Mai Tu Xuan, Roland Wetter

The LCI (Load commutated Inverter) is still today a suitable solution for supplying high power variable speed drive systems. The following main topics are described in this contribution: The modeling of a 20 MW LCI synchronous drive system for a compressio ...

2002

Analysis of Slip Energy Recovery Drives Behavior Using the Compex Torque Coefficient Method

Basile Kawkabani, Alain Sapin, Jean-Jacques Simond

The aim of the present paper is to extend the well-known complex torque coefficient method usually used for synchronous machine rotor oscillations, to a slip energy recovery induction motor drive. To illustrate the effectiveness of the proposed extension, ...

2002

A New tool for the simulation of dynamic behaviour of hydroelectric power plants

François Avellan, Alain Sapin, Jean-Jacques Simond

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

2001

Doubly-Fed Asynchronous Machine with 3-Level VSI cascade for Variable Speed Pump Storage

André Hodder, Alain Sapin, Jean-Jacques Simond

This paper deals with a fixed-frequency variable-speed motor/generator with 3-level VSI (Voltage Source Inverter) cascade. The 3-level VSI is applied to a DASM (Doubly-fed ASynchronous Machine) for large pump storage plants. The extension to 3 levels is th ...

2000

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

Synchronous machines parameters determination using finite elements method

Jean-Jacques Simond, Mai Tu Xuan

The paper deals with the determination of synchronous machine parameters using a 2D Finite Element Method – FEM (Flux2D- Cedrat). Simulations of no-load sudden three phase short- circuits are performed in rotation, the saturation effects and the eddy curre ...

2000

Investigation of transient overvoltages of low voltage induction motors due to IGBT-Inverter supply

Basile Kawkabani, Jean-Jacques Simond, Roland Wetter

The present paper investigates transient overvoltages on ac induction motors when connected through a cable of arbitrary length to IGBT-PWM inverters. Considering classical transmission line analysis, and traveling-wave analysis with zero initial charges o ...

2000

Détermination numérique des paramètres du rotor d'une machine synchrone à pôles saillants lamellés

Jean-Jacques Simond

EPFL1976

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