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This work aims to analyze and validate through mathematical modeling and experimental results, in a three-phase three-wire electrical system, the technical viability of a static power converter with a two-level topology with only two controlled branches (2L2B), operating as a grid-side converter (GSC) in a wind turbine generator based on a doubly fed induction generator (DFIG). With this reduced-switches topology, the GSC is able to regulate the DC-link voltage level from the generator back-to-back converter and provide ancillary services of harmonic filtering and reactive power compensation from linear/nonlinear loads connected to the point of common coupling. An 8-kVA experimental prototype was implemented in the laboratory to validate the proposal. The prototype control system was realized using the dSPACE DS1103 PPC Controller Board platform programmed via MATLAB/Simulink. The effectiveness of the proposed system is verified by comparing the results obtained with the 2L2B topology to the ones with the usual two-level three-branch topology.

Abstract. With the fast growth of wireless communicationsbetween nodes/sensor units, devices installed in remote places require continuously energy supply for their functionality or communication requirements. For these applications energy harvesting takes place as a good solution to increase the availability of energy, in opposition to the conventional systems of energy supply. Regenerative energy sources like thermoelectric, magnetic, piezoelectric, and/or renewable sources such as photovoltaic and wind, among others, allowed the development of different powering solutions for sensor units. The purpose of this work is to characterize a three-phase micro generator that is used to convert the energy extracted from wind or water flow, among others mechanical energy sources, to electrical energy. The study is carried out taking into account the velocity of axis versus power provided to a load.

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