ANÁLISE DOS PARÂMETROS DE ENGENHARIA ASSOCIADOS AOS INVERSORES GRID TIE

Abstract

This paper aims to analyze the engineering parameters associated with Grid Tie inverters, to present a study about its operation, as well as to observe their possible impacts on the utility grid. In the grid mode, the inverter, being an equipment of total relevance in a photovoltaic generation system, counts on important mechanisms that, besides allowing the conversion of the direct current (DC) generated by the panels, into alternating current (AC), necessary to feed most of the existing loads, are also able to allow its connection to the utility network. Such mechanisms, such as synchronism and anti-islanding protection, for example, must comply strictly with safety and quality standards because, in addition to directly influencing the quality of the energy generated by the utility, they must also guarantee the integrity of the system and the life of people who may be working on possible repairs to the network. Considering its complexity of operation and the important engineering concepts involving these inverters, it is therefore justified a globalized study of its operation through a bibliographic review and an analysis of its electrical parameters through field measurements to evaluate impacts on the utility's electrical system. Dissertations and theses already developed on the subject, norms that regulate its operation, as well as materials necessary for tests and measurements in an inverter were used and the data were confronted with the limit values considered by PRODIST in its module 8, for the quality of energy .