Distributed generation system using renewable energy sources and a new converter topology

This paper presents the development of a renewable energy-based distributed generation (DG) system able to operate in standalone or grid-connected mode. When the utility ac grid if disconnected, the DG system can still supply part of the local loads. The proposed system consists of a wind turbine generator, solar photovoltaic (PV) modules, a battery bank, and two power converters arranged in an experimental setup. The first converter is a bridgeless boost rectifier, which is connected directly to the wind turbine and responsible for the speed control and tracking the maximum power point (MPP). The second converter is a bidirectional ac-dc topology bidirectional multi-port, connects these energy sources to the grid, the main functions: Setting the converter bus wind generator; performing the charge and discharge of the battery bank; MPPT in photovoltaic panels; and energy injection generated in the local grid. After studying the art of distributed generation and the context of the proposed system are described the two converters developed in the laboratory, where it is made a brief analysis of each of them. Simulation results preliminary experimental results are presented validating the developed analysis and operation of developed topologies.