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Theses

Optimisation d'un système de pompage d'eau à l'aide d'une éolienne à vitesse variable

Abstract : One of the current concerns on a global scale and one of the main problems in the development of arid, semi-arid and isolated regions where access to conventional energy is difficult if not practically impossible, is 'water supply, either for domestic consumption (by people), or for the farmer (breeding and irrigation). Considering the importance of wind potential and the increased demand for the use of renewable energy systems for pumping water, the advantages of wind pumps are enormous: reliability, long term profitability, simple operation etc ... But the major drawback of systems using clean energy is that they require a certain financial investment, the payback period of which can sometimes prove to be long. This project aims to optimize the efficiency of the various energy converters and will therefore reduce this duration. From an economic point of view, this is therefore profitable for the consumer. In wind power conversion systems, closed loop control is required to maximize the captured wind energy power. The major drawback of such a system is the extremely non-linear behavior of the wind turbine / generator. Conventional control strategies have shown poor resistance to external disturbances, poor convergence performance, and poor stability in the face of changing environmental conditions. Accurate wind speed and generator rotational speed information is essentially needed to operate the system at maximum power points. In most cases, a number of anemometers surrounding the wind turbine at a distance are needed to provide adequate information on wind speed. These mechanical sensors increase considerably equipment and maintenance costs and reduce the overall reliability of the system. In this thesis, we are interested in the study of water pumping systems using variable speed wind turbines. The objective is to develop and manufacture an intelligent water pumping system, ensuring better use of the overall system, in particular the optimization of the power produced by the variable speed wind turbine and the improvement of the pumped water flow. This research theme revolves around the following axes: modeling and sizing of the elements of the wind power system and the pump, the study of suitable converters for the variable speed wind turbine and the pump motor, the study of MPPT controls to regulate and maximize the power generated by the wind turbine, the proposal of robust controls to improve the operation of the wind power system and the pump motor unit. This project also aims: the elimination of mechanical sensors (wind speed, position and speed of rotation) in a power maximization control (Maximum Power Point Tracking). The idea consist to use state observers capable of estimating mechanical quantities using less expensive sensors
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Submitted on : Wednesday, March 30, 2022 - 3:08:08 PM
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Soufyane Benzaouia. Optimisation d'un système de pompage d'eau à l'aide d'une éolienne à vitesse variable. Autre. Université de Picardie Jules Verne; Université Mohammed Premier Oujda (Maroc), 2020. Français. ⟨NNT : 2020AMIE0052⟩. ⟨tel-03624855⟩

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