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Compensation des Harmoniques en utilisant un Filtre Actif Parallèle de Puissance à deux niveaux c... more Compensation des Harmoniques en utilisant un Filtre Actif Parallèle de Puissance à deux niveaux contrôlé par Logique Floue et relié à une Source Photovoltaïque (Reçu xxx 2012, accepté xxx 2012, sera pris en charge par l'éditeur) Résumé. Cet article présente la conception du contrôleur optimal par logique floue , contrôlé un filtre actif parallèle de puissance FAP (Active Power Filter shunt –APFs en anglais) relié à un système photovoltaïque pour la compensation des harmoniques qui sont injectés par des charges non linéaires. Ce procédé est appliqué à un FAP basé sur un convertisseur de tension triphasé à deux niveaux. La contribution principale de ce papier est l'utilisation de la méthode d'une série de trois filtres passe-bande second ordre, pour le calcul des courants de référence, et l'application de la logique floue pour une meilleure précision de contrôle du filtre actif. Pour la génération d'impulsions, nous utilisons la stratégie MLI. Les résultats présent...

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This article presents two methods for the compensation of harmonics generated by a nonlinear load... more This article presents two methods for the compensation of harmonics generated by a nonlinear load. The first is the P-Q algorithm method. The second is the controller by fuzzy logic. Both methods are applied to a shunt Active Power Filter (sAPF) based on a three-phase voltage converter at five levels NPC topology. In calculating the harmonic currents of reference, we use the algorithm P-Q and pulse generation, we use the intersective PWM. For flexibility and dynamics, we use fuzzy logic. The results give us clear that the rate of harmonic distortion issued by fuzzy controller is better than P-Q algorithm.

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This article presents two methods for the compensation of harmonics generated by a nonlinear load... more This article presents two methods for the compensation of harmonics generated by a nonlinear load. The first is the classic method P-Q. The second is the controller by modern method of artificial intelligence specifically fuzzy logic. Both methods are applied to a shunt Active Power Filter (sAPF) based on a three-phase voltage converter at five levels NPC topology. In calculating the harmonic currents of reference, we use the algorithm P-Q and pulse generation, we use the intersective PWM. For flexibility and dynamics, we use fuzzy logic. The results give us clear that the rate of Harmonic Distortion issued by fuzzy logic is better than P-Q.

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The objective of this paper is to improve the quality of the energy transfer from the power suppl... more The objective of this paper is to improve the quality of the energy transfer from the power supply to the load, and to reduce the harmful effects of the harmonic generated by non-linear loads. Harmonic pollution is a phenomenon which affects all electrical networks in industrial plants, offices and homes. No modern environment can escape this pollution which is caused by “Non-Linear” or “distorting” loads such as personal computers, servers, fluorescent tubes, air conditioning units, variable speed drives, arc lights, static rectifiers, microwave ovens, TVs, halogen lamps, etc.
In this paper, the problem of the degradation of the current in the installations electric is imposed, which ensues directly from the proliferation of the non-linear loads, to resolve it; a five levels inverter with Neutral Point Clamping (NPC) structure is used as Active Power Filter shunt (APFs). The compensation process is based on concept of P-Q Algorithm. It provides effective compensation for harmonics.

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In this study, we proposed two techniques to track the maximum power point (MPPT) of a photovolta... more In this study, we proposed two techniques to track the maximum power point (MPPT) of a photovoltaic system. The first is an intelligent control technique, and the second is robust used for variable structure system. In fact the characteristics I-V and P–V of the photovoltaic generator depends on the solar irradiance and temperature. These climate changes cause the fluctuation of maximum power point; a maximum power point tracking technique (MPPT) is required to maximize the output power. For this we have adopted a control by fuzzy logic (FLC) famous for its stability and robustness. And a Siding Mode Control (SMC) widely used for variable structure system. The system comprises a photovoltaic panel (PV), a DC-DC converter, which is considered as an adaptation stage between the PV and the load. The modelling and simulation of the system is developed using MATLAB/Simulink. SMC technique provides a good tracking speed in fast changing irradiation and when the irradiation changes slowly or it is constant the panel power of FLC technique presents a much smoother signal with less fluctuations.

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The object of this paper is the study of various modulation strategies applied to the five-level ... more The object of this paper is the study of various modulation strategies applied to the five-level inverter neutral-point-clamped NPC topology. Firstly we presented the structure of the voltage inverter three-phase five-level NPC topology. After that we model the inverter and the inverter are controlled by different strategies and then we made a comparative study between the results given by different strategies.

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This paper proposes a technique of intelligent control to track the maximum power point (MPPT) ... more This paper proposes a technique of intelligent control to track the maximum power point (MPPT) of a photovoltaic system . The PV system is non-linear and it is exposed to external perturbations like temperature and solar irradiation. Fuzzy logic control is known for its stability and robustness. FLC is adopted in this work for the improvement and optimization of control performance of a photovoltaic system. Another technique called perturb and observe (P & O) is studied and compared with the FLC technique. The PV system is constituted of a photovoltaic panel (PV), a DC-DC converter (Boost) and a battery like a load. The simulation results are developed in MATLAB / Simulink software. The results show that the controller based on fuzzy logic is better and faster than the conventional controller perturb and observe (P & O) and gives a good maximum power of a photovoltaic generator under different changes of weather conditions

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Le but de cet article est d’applique les algorithmes génétiques (AG) dans la résolution d’un syst... more Le but de cet article est d’applique les algorithmes génétiques (AG) dans la résolution d’un système algébrique non linéaire où cette résolution est nécessaire pour étudier la technique d’élimination d’harmoniques appliquée aux onduleurs monophasé et triphasés à cinq niveaux. Le principe de la technique est d’imposé les créneaux de tension et calculé les angles de commutation pour éliminer les harmoniques des rangs voulues par la résolution d’un système équations non linaires en appliquant les Algorithmes Génétiques (AG) à l’aide d’un logiciel de calcule et tracer l’allure des angles calculés en fonction de taux de modulation,

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The object of this paper is to analyse the behaviour and the performances of a three-phase induct... more The object of this paper is to analyse the behaviour and the performances of a three-phase induction machine supplied with a five level neutralpoint-clamped (NPC) inverter controlled by Selective Harmonic Eliminated Pulse-Width Modulation Technique (SHEPWM). First, the modelling of the inverter and the machine is presented. Thereafter, a theoretical study of the harmonics elimination strategy is detailed; where the genetic algorithm (GA) for elimination purposes is used. After that, this strategy is validated by simulation. Finally, a behaviour of the induction machine controlled with this inverter is presented.

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This article presents two methods for the compensation of harmonics generated by a nonlinear load... more This article presents two methods for the compensation of harmonics generated by a nonlinear load. The first is the classic method P-Q. The second is the controller by modern method of artificial intelligence specifically fuzzy logic. Both methods are applied to a shunt Active Power Filter (sAPF) based on a three-phase voltage converter at five levels NPC topology. In calculating the harmonic currents of reference, we use the algorithm P-Q and pulse generation, we use the intersective PWM. For flexibility and dynamics, we use fuzzy logic. The results give us clear that the rate of Harmonic Distortion issued by fuzzy logic is better than P-Q.

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