Novos conversores CA-CA matriciais indiretos com os terminais do estágio retificador abertos para aplicação em sistemas de geração distribuída.

Abstract

The AC-AC Matrix Converter can provide frequency and amplitude transformation si- multaneously of voltage-current systems. They do not have any energy storage elements,

which implies a high power density. Such characteristics explain the great interest in this

category of converters, in industrial applications, military, high temperature and power gen- eration. Also features excellent power quality. The proposed topology is based on the

functionality of the indirect matrix converter, and titled as Two-to-Three-Phase AC-AC Indirect Matrix Converter with Open-end Rectifier Stage. The proposed topology has as rectifier stage a two-phase XCSR, this a current source converter with open-end terminals. The inverter stage is a typical two-level three-phase voltage source inverter. The PWM used was the space vector, where the rectifier stage only switches in freewheeling time of inverter, avoiding overvoltage and overcurrent. In this sense, there is a significant decrease in switching losses. The topology is applied to a two-phase three-phase system, with open-end input terminals. Such a configuration has never been proposed before in the literature. The proposed converter was designed for use in a distributed generation system. The converter waveforms showed low THD and WTHD indices. The prototype designed resulted in a compact and high power density converter (0.95 kW / liter). Also proposed reduced active switch count topologies based on Two-to-Three-Phase AC-AC Indirect Matrix Converter with Open-end Rectifier Stage.