INVERSOR MONOFÁSICO CC/CA E SUA APLICAÇÃO EM SISTEMAS FOTOVOLTAICOS CONECTADOS A REDE

Abstract

This work discusses the interaction between the inverters of grid connected PV systems and the resulting power quality. When inverters deliver energy to the grid, they inject a waveform which theoretically should be purely sinusoidal, but depending on the inverter and the percentage of power being injected in relation to its rated output, this current presents certain degree of distortion. On the other hand, the low voltage network must possess a degree of power quality to allow the operation of inverters. These inverters monitor the network so that they only provide energy if the grid is present and with its default characteristics. There are still few SFCR in Brazil, and many of these systems are installed in universities and research centers, few problems with power quality are reported, but this scenario has changed a lot in recent years. In these environments, different from the industrial environment, there is less tendency of the electrical energy to present high harmonic content. In this work we studied DC / AC inverters Photovoltaic Systems Connected to Network which will be made studies to improve the connection between them aiming at the improvement of the connection parameters between them. The goal is to fabricate a single-phase inverter doing so it can connect to the grid. They will be made computer simulations using PSIM software.