Grid connected inverter without transformer for the inclusion of distributed photovoltaic sources.

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Julio César Viola http://orcid.org/0000-0001-6882-0791
José Alex Restrepo Zambrano
José Manuel Aller Castro
Flavio Alfredo Quizhpi Palomeque

Abstract

This paper addresses the study, design and implementation of a multilevel inverter aimed to operate with the Ecuador’s most commonly used electrical distribution schemes, being able to be connected to the grid without a transformer. The implemented control allows to revert the power flow if it is required (e.g. charge a battery bank). The paper shows the different steps for the design, as well as simulations and preliminary experimental results.