Parallel Active Filtering based on a three –phase multicell converter

International audienceThe energy issues related to the quality of the distribution of electrical energy require the development of active filtering devices of electrical networks. By injecting a current in phase opposition with the harmonics of the load (disruptive currents), the active power filter makes it possible to improve the quality of the electrical energy sampling and thus answers this problem. The aim of this article is based on the use of a three – phase multicellular converter with three switching cells per phase, to perform this function. The four voltage levels of this inverter provide the frequency benefits we will use. We start by modeling the filter in the sense of the instantaneous values and then we present its triangulo-sinusoidal control strategy. Subsequently we will develop the steps of the filter control. We finish by presenting the results of simulations of the harmonic current compensation

Nonlinear dynamic of the multicellular chopper

International audienceIn this paper, the dynamics of multicellular chopper are considered. The model is described by a continuous time three-dimensional autonomous system. Some basic dynamical properties such as Poincaré mapping, power spectrum and chaotic behaviors are studied. Analysis results show that this system has complex dynamics with some interesting characteristics

Étude des comportements chaotiques dans les convertisseurs statiques

This thesis deals with the analysis of chaotic behaviors in serial multicellularconverters. These switching systems can have a variety of complex phenomenaassociated with bifurcations and chaos. Knowing that a power converter that has a purely dissipative load cannot generate chaotic behavior, we've in the first part of this thesis, we connected a two-cell chopper to a nonlinear load not strictly dissipative and we've analyzed its behaviors by using some basic dynamic properties and thus presented the routes to chaos. The end of this part was devoted to the study of the 5-cell chopper which is a generalization of the two-cell chopper. In order to eliminate the chaotic behavior, the second part was devoted to the synthesis of a controlled law based on hybrid modeling of Petri nets for the regulation of capacitor voltages and current load.Les travaux de cette thèse portent sur l'analyse des comportements chaotiques dans les convertisseurs multicellulaires séries. Ces systèmes à commutationpeuvent présenter une variété de phénomènes complexes liés à des bifurcationset au chaos. Sachant qu'un convertisseur de puissance qui a une charge purementdissipative, ne peut générer un comportement chaotique, nous avons dans la première partie de cette thèse, connecté un hacheur à deux cellules à une charge non linéaire non strictement dissipative et nous avons analysé ses comportements à l'aide des propriétés dynamiques de base et présenté les routes vers le chaos. La fin de cette partie a été consacrée à l'étude du hacheur à cinq cellules qui est une généralisation du hacheur à deux cellules. Afin de supprimer le comportement chaotique, la deuxième partie du travail a été consacrée à la synthèse d'une loi de commande hybride basé sur la modélisation par réseaux de Petri pour la régulation des tensions des condensateurs flottants et du courant de charge

Dynamical Properties and Chaos of the Multicellular Converter Associated With a Nonlinear Load

International audienceThe multicellular chopper connected with a nonlinear load is investigated by detailed theoretical and analysis as well as dynamic simulation, including some basic dynamical properties, Lyapunov exponent, fractal dimension, bifurcation diagrams and routes to chaos. In the parameter space where the equilibria of the system are both asymptotically stable, chaotic attractors coexist with period attractors and stable equilibria. Our system displays 2 scroll chaotic attractors for certain values of its parameters

Stability study and dynamical analysis of the multicellular chopper

International audienceThe dynamical properties of a two-cells chopper connected to a particular nonlinear load are described in this paper. Some interesting and complex attractors are obtained. We analyse the system by means of Lyapunov exponents, fractal dimension, Poincaré mapping, first return, bifurcation diagram and phase portraits, respectively. Our model is described by a continuous time three-dimensional non-autonomous system and displays two-scroll chaotic attractors for certain values of its parameters. The numerical simulation is used to figure out their chaotic attractors. The analysis results show clearly that this is a new chaotic system which deserves further detailed investigation. Finally, phase portraits are obtained by using MATLAB/Simulink, which validates the theoretical analysis results. Reference to this paper should be made as follows: Djondiné, P., Barbot, J-P. and Ghanes, M. (2018) 'Stability study and dynamical analysis of the multicellular chopper', Int

On the Petri Nets Control of the Multicellular Converter

International audienceThe serial multicellular structure of static converters is widely used for high power applications. However, some controls of these converters are unreliable and are sensitive to fluctuations in some of its parameters. In this article is proposed a control by Petri nets that has overcome these deficiencies by making the converter robust vis-à-vis fluctuations that can affect the load or the input voltage. This has been successfully tested by digital simulation in the case of a two-cell converter connected to a non-strictly dissipative non-linear load

Comparison of Sliding Mode and Petri Nets Control for Multicellular Chopper

International audienceIn this paper a new class of power converters, serial multicellular chopper, will be studied. After recalling the dynamical equations of the converter, its hybrid dynamical behavior and properties are highlighted. This hybrid system induces new and difficult control problems. Then, two control strategies are proposed. The first is a sliding mode control and the second is a Petri Nets control. Some simulations are carried out to prove the efficiency and the robustness of the two controls for the case of a two cells converter connected to a nonlinear load. The comparison between sliding mode control and Petri nets control is carried out. Simulation results are provided to verify the conclusions

Stability study and dynamical analysis of the multicellular chopper

International audienceThe dynamical properties of a two-cells chopper connected to a particular nonlinear load are described in this paper. Some interesting and complex attractors are obtained. We analyse the system by means of Lyapunov exponents, fractal dimension, Poincaré mapping, first return, bifurcation diagram and phase portraits, respectively. Our model is described by a continuous time three-dimensional non-autonomous system and displays two-scroll chaotic attractors for certain values of its parameters. The numerical simulation is used to figure out their chaotic attractors. The analysis results show clearly that this is a new chaotic system which deserves further detailed investigation. Finally, phase portraits are obtained by using MATLAB/Simulink, which validates the theoretical analysis results. Reference to this paper should be made as follows: Djondiné, P., Barbot, J-P. and Ghanes, M. (2018) 'Stability study and dynamical analysis of the multicellular chopper', Int

On the Petri Nets Control of the Multicellular Converter

International audienceThe serial multicellular structure of static converters is widely used for high power applications. However, some controls of these converters are unreliable and are sensitive to fluctuations in some of its parameters. In this article is proposed a control by Petri nets that has overcome these deficiencies by making the converter robust vis-à-vis fluctuations that can affect the load or the input voltage. This has been successfully tested by digital simulation in the case of a two-cell converter connected to a non-strictly dissipative non-linear load

Stability study and dynamical analysis of the multicellular chopper

International audienceThe dynamical properties of a two-cells chopper connected to a particular nonlinear load are described in this paper. Some interesting and complex attractors are obtained. We analyse the system by means of Lyapunov exponents, fractal dimension, Poincaré mapping, first return, bifurcation diagram and phase portraits, respectively. Our model is described by a continuous time three-dimensional non-autonomous system and displays two-scroll chaotic attractors for certain values of its parameters. The numerical simulation is used to figure out their chaotic attractors. The analysis results show clearly that this is a new chaotic system which deserves further detailed investigation. Finally, phase portraits are obtained by using MATLAB/Simulink, which validates the theoretical analysis results. Reference to this paper should be made as follows: Djondiné, P., Barbot, J-P. and Ghanes, M. (2018) 'Stability study and dynamical analysis of the multicellular chopper', Int