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MODELISATION ET ANALYSE DE L'INTEGRATION DES ENERGIES RENOUVELABLES DANS UN RESEAU AUTONOME

Ionel Vechiu 1, *
* Corresponding author
Abstract : In many of the remote areas, the diesel generator is the main source of power supply. The cost of grid extension is, and will probably continue to be, prohibitive and the fuel cost increases severely with the remoteness of the location. The combination of several energy sources (wind turbines, photovoltaic panels, small hydroelectric power plants etc.) in a Hybrid Power System (HPS) can be very attractive for most of the remote areas, in terms of cost and availability.
However, improvements of the design and operation of the HPS are still needed to make this technology more competitive in remote areas. In this context, the work presented in this thesis is a contribution to the behaviour analysis and the performances control of an HPS constituted by two renewable energy sources, a diesel generator and storage batteries. This kind of system is studied according to three aspects: sizing, maximizing the use of the renewable resources and power quality.
To maximize the use of renewable resources, the size and operation of the HPS components are matched to the load and the available renewable resources. Then, simulation models for all components of the HPS are developed and brought together in a parametric library under MATLAB/Simulink environment. The simulation models, sufficiently precise, are used in a modular manner for a higher flexibility of the HPS dynamic behaviour investigation and to test different control strategies. Each source of the system includes a control strategy either to satisfy an energy criterion or to reproduce a realist dynamic behaviour.
In order to be able to analyze and to improve the voltage quality, simulation models capable of treating unbalances were developed. A four-leg bi-directional converter is the proposed solution to mitigate the voltage unbalance. Special control strategies associated to this topology have been proposed to improve the quality of the output voltage under unbalanced load conditions.
The simulations results show that using power electronics and the suitable control strategies, it is possible to have a high level integration of renewable energy sources and to improve the power quality of an HPS.
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Ionel Vechiu. MODELISATION ET ANALYSE DE L'INTEGRATION DES ENERGIES RENOUVELABLES DANS UN RESEAU AUTONOME. Energie électrique. Université du Havre, 2005. Français. ⟨tel-00179164⟩

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