Topologias baseadas no conversor Zeta aplicadas em módulos Pv integrados para carga de baterias

Abstract

The management system and Future Renewable Electric Energy Delivery (FREEDM) is an example of microgrid distributed generation (GD), which has a power management. In the current DC bus the FREEDM are connected to the integrated modules (MIC), energy storers and others renewable energy sources. In order to increase system efficiency is proposed integrated module to charge batteries (MIBC). The MIBC is constituted by a high voltage gain converter with voltage battery charger feature. The load current of the batteries, to preserve their life, should be low ripple and approximately 10% of battery capacity. Therefore, the converter must have a second order filter in the output which requires a control of the output current. A converters integration methodology was studied, so finding the integrated Boost-Zeta converter. Thereafter, it was made a revision of auto-transformer that originated the 2Zeta converter. To complete the group of converters to be studied was included Isolated Zeta converter. Both converters have the characteristics ideas to MIBC. The Integrated Zeta-Boost converter has a high voltage gain due to the boost of the sum of the voltages of the output section with the output section Zeta. While 2Zeta converter has a high voltage gain due to auto-transformer that increases one in primary transformation ratio for the secondary. Finally, the Zeta Isolated converter also provides a high-gain voltage due to the transformation ratio of the coupled inductor. All converters have a second order filter which is desirable for the MIBC. Since the application is the MIBC was made a project of the parameters and unified control of converters. Since there are three converters based on the Zeta converter, a comparative analysis was necessary thereof, demonstrated the advantages and disadvantages of each. Finally, the prototypes reached the expected results, but the dispersant of inverters coupled inductor presented ripples in waveform of unwanted currents and voltages.