Browsing by Author "Achour, Djalloul"

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    Commande et supervision d'un réseau électrique hybride autonome
    (2017) Achour, Djalloul
    Aujourd'hui, les réseaux électriques hybrides autonomes sont des solutions communes de l'augmentation incroyable des émissions de CO2 et de l'alimentation en énergie électrique dans les zones isolés. Mais, le réseau électrique hybride autonome ne peut pas être efficace et fiable sans un système de commande et de supervision robuste. Dans cette thèse, trois différentes topologies de réseau électrique hybride autonome avec leurs systèmes de commande et de supervision développés sont proposées. La première topologie consiste en un générateur diesel et un générateur éolien. La deuxième topologie consiste en générateur éolien, générateur photovoltaïque, batterie et générateur diesel. La dernière topologie est composée d'un générateur éolien, d'un générateur photovoltaïque, d'une pile à combustible, d'un électrolyseur et d'un générateur diesel. Le premier système de commande et de supervision développé est basé sur un contrôleur floue-PID-PI, la deuxième est basée sur un contrôler floue et la troisième est basé une commande de flux de puissance et un gestionnaire des charges. Les trois systèmes hybrides sont simulés en utilisant le logiciel Matlab/Simulink®. Malgré les scénarios compliqués des sources naturelles et la demande de charge, les performances améliorées des systèmes de commande et de supervision développés sont validées par les résultats satisfaisants obtenus. La charge du village avec les trois topologies a été satisfaite. En outre, Dans le premier système hybride, la tension et la fréquence sont stabilisées avec des déviations acceptables autour les valeurs standards. Dans le deuxième système hybride, les émissions quotidiennes de CO2 sont réduites à 414,5794 kg / l et la fréquence est réglé. Dans le troisième système hybride, les émissions quotidiennes de CO2 ont été réduites à 352,05 Kg / l et la fréquence est stabilisée autour la valeur standard avec les fluctuations
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    Control of a Solar PV/wind Hybrid Energy System
    (Elsevier, 2016) Chaib, Ahmed; Achour, Djalloul; Kesraoui, Mohamed
    A serious disadvantage of coupling a solar PV and wind energies of a hybrid system into the main DC bus is the compatibility of the voltage. In fact the PV system response is faster than the wind system one. This can affect negatively on the whole hybrid system response especially in case of variable loads switching. In this paper a hybrid energy system consisting of two sources: wind turbine generator and photovoltaic solar, without energy storage is modeled and simulated using MATLAB/SIMULINK. Management of the obtained power is achieved through two adaptor switches in the DC output of both sources. Each subsystem switch is controlled in order to supply either a dump load or the consumers’ loads via an inverter. The objective is to obtain an acceptable (compromise) system response and to make it more compatible. A control strategy of those two switches is proposed to adapt the inputs of the sources to the output of the DC bus. Satisfying results have been obtained in terms of voltage response stability, precision and global compatibility achievement
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    Energy Management and Control of a Hybrid Water Pumping System with Storage
    (Pléiades Publishing, 2017) Lazizi, Aldjia; Kesraoui, Mohamed; Achour, Djalloul; Chaib, Ahmed
    This paper aims to define a control and management strategy for water pumping system which would be powered by a hybrid PV/diesel generator system with battery storage. The particularity of the proposed power management method is to ensure the water volume in need and to maximize the use of PV generator while limiting the use of the diesel generator. In order to capture the maximum power from PV generator, a fuzzy logic maximum power point tracking controller is applied. On the other hand, a PI regulator is used with a boost converter in order to adapt the voltage of the battery bank to the DC bus. The water flow of the pump is also controlled. The developed power management and control strategy has been implemented using SIMPOWER toolbox in Matlab/Simulink. The obtained satisfying simulation results prove the efficiency of the proposed solution that assures continuous supply of water and electricity
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    Grid voltage local regulation by a doubly fed induction generator–based wind turbine
    (Sage journals, 2017) Kesraoui, Mohamed; Chaib, Ahmed; Bendaoui, Boujemaa; Achour, Djalloul
    Voltage regulation at point of common coupling using a doubly fed induction generator–based wind energy conversion system is achieved through reactive power control. Wind energy conversion system produces reactive power when the voltage is less than grid nominal voltage and it consumes it in the opposite case. In this article, a method to achieve this goal is proposed. It consists of controlling the reference value of the vector control system in order to affect the wind energy conversion system reactive power output. Two situations have been simulated. Sudden voltage increase and decrease were applied to the control system. Satisfying results have been obtained since the voltage at point of common coupling has been restored back to its initial value
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    Mechanical wind pumping system based on hydropumped storage
    (IEEE, 2022) Achour, Djalloul; Kesraoui, Mohamed
    In this paper, a new pumping system where a controlled storage has been integrated to a classical mechanical wind pumping system is proposed. The new system consists mainly of a wind turbine, a controlled storage and a piston pump. The objective of this developed system is to improve the standard system global power efficiency. First, a literature survey over what has been done up to now on wind pumping and pumped storage is presented. The details of the proposed system design are given. Then, the advantages of this new system compared to a classical one are shown. Finally, the developed wind pumping system and the standard mechanical wind pumping system were simulated in order to prove that the proposed system has the best results in terms of power efficiency and stored water
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    New concept of wind pumping system : introduction and state of the art
    (IEEE, 2020) Achour, Djalloul; Kesraoui, Mohamed
    In this paper a new concept of wind pumping system that combines the advantages of the mechanical wind pumping system and those of the electrically powered one is proposed. The system consists mainly of a wind turbine, a DC machine and storage facility. The whole system will be controlled in a goal to improve the total power efficiency. First, a literature survey over what has been done up to now on wind pumping is presented. The details of the proposed system design are given. Then, the advantages of the proposed system compared to actual ones are shown. Then since this system is a part of an accepted PRFU national research project 2020-2024, an Algerian windy site for its intended implementation is suggested. Finally the three wind pumping systems are simulated to prove that the developed one has the best results