Conexão à rede de painéis fotovoltaicos via pontes H em cascata com conversor trifásicos de seis braços.

Abstract

This work presents the development of an interface for connecting photovoltaic systems to the power grid, focused on improving power quality and grid support. The proposal arises from the need to mitigate issues such as solar intermittency and partial shading, which cause imbalances and distortions in current power systems. To this end, a topology based on a six-arm converter with a single shared bus was proposed, used as an interface between photovoltaic panel generation and the power grid, allowing the structure to act simultaneously as a generation interface and an active power filter. In the study’s development, system mathematical modeling, modulation strategies, and hierarchical control loops were established. The results, obtained through computational simulations, validate the effectiveness of the solution in both steady-state and imbalance conditions, ensuring stability and low harmonic distortion in the injected current. The study demonstrates that the topology represents a robust and efficient alternative for the modernization of distributed generation.