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This paper presents control system design of a small size wind generation system for battery charging using a multiblade wind turbine. A boost converter is used to regulate the battery bank voltage. Thus, an MPPT algorithm can be implemented as well as the reduction of the mechanical speed can be performed in order to avoid a battery overcharging or overcurrent. The system overview and modeling are presented including characteristics of wind turbine, generator, batteries, power converter, control system, and supervisory system. A simulation of the system is performed using MATLAB/SIMULINK software to obtain the MPPT points. Experimental results for the complete system are also presented.Keywords -Battery charger, wind energy conversion system, maximum power point tracking, multiblade wind turbine.

This paper presents the analysis, design, simulation, and experimental results for a three-stage static power converter for battery charging feasible to small wind energy conversion systems (SWECS). The system employs a boost converter cascaded with a Graetz bridge, that allows the implementation of a Maximum Power Point Tracker (MPPT) and the reduction of the mechanical speed under overvoltage conditions across the batteries. Besides, a buck converter is connected in series with the boost stage to ensure a constant voltage bus between the aforementioned topologies. Thus, it is possible to extract the maximum power over the entire wind speed range, and battery charging can be realized through conventional techniques. The complete design of the proposed battery charger including power, control, and supervisory circuits are presented and developed, considering a 300 W system, with the possibility of charging battery banks rated at 12 V or 24 V. Simulation results are presented to prove the existence of maximum power points in the wind generator. Finally, experimental results of the developed prototype required to validate the functionality of the proposed study are presented and discussed.

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Abstract. This paper proposes a new control strategy to the grid side converter (GSC) of a DFIG-based wind turbine enabling the DFIG's FACTS features. This control strategy is based on the pq Theory which take advantage of this converter to improve the energy quality at the point of common coupling (PCC) acting as an active filter in the specific case adopted in this article. The control strategy of the rotor side converter (RSC) adopted was the classical field-oriented control which determines the active and reactive power that will be injected in the electrical system. Simulation results in PSCAD/EMTDC and some discussions are also shown throughout the paper.