Análise de conversores multníveis conectados à rede elétrica: utilização como filtros ativos e sistemas fotovoltaicos

Abstract

Given the current technological growth and the integration of the alternative energy generation, it is observed that the development in the areas of power electronics and control, has been leveraging the electric sector through devices capable of processing high levels of power besides guaranteeing a high level of power quality, with minimum harmonic distortion and high power factor.In this sense,power converters deserveto be highlightedbecause theyare verywidespread in power conversion and conditioning applications, especially multilevel converters because they present attractive performance by processing higher power levels, reducing harmonic content and reducing conduction losses. From this point, the present work aims to present an application that integratesthe photovoltaic generationand the compensation of reactive,adding twosimultaneous functions to the converter. For this, a study of the main topologies of the multilevel converters is carried out, in order to choose the best topology for the application. The methodology adopted for the converter was made based on the mathematical modeling and the representation in coordinates dq0. The application of the referential change from a time-varying three-phase system to abc for continuous dq0 allows simplification of the system for better manipulation of variables, making control simpler to implement.