Browsing by Author "Chikha, Said"

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    Contribution à l’optimisation de la commande prédictive des convertisseurs statiques intégrés dans les chaines de conversion d’énergie éolienne
    (Université Larbi Ben M'hidi, 2017) Chikha, Said
    In order to improved the quality of electrical power transmitted between the wind energy conversion systems and the electric grid we present in this PhD theses a study and implementation of a new type of control technologies to control the power converters (back to back 2 levels, three levels, direct matrix converter and indirect matrix converter). The finite set model predictive control based on the model of the system and cost function represents the desired response is used in order to assure the high level of the active and reactive power transmission between the rotor of the doubly fed induction generator and the electrical grid. The main advantage of the FS-MPC method lies in its simplicity of implementation. In addition, the constraints are taken into account thanks to its flexibility which considerably reduces the overall cost of the drive system. In second part, we applied a new kind of wind farm based on the indirect matrix converter with six legs for purpose to control two DFIGs in the same time. The connection of this wind farm to electrical power is depending on several operating modes of the wind generator. Each mode of them, the DFIG and the power converter take a specified reference power. The supervisory algorithm is distribute the power reference with the proportional way, the principal choice of this algorithm is disturbed the reference power on each DFIGs and each power converters tacking in to count the maximal reactive power