Desenvolvimento do Estudo de Proteção e Coordenação Para Conexão de uma Minigeração Fotovoltaica da UFV Bernoulli de 1,4MWp

Abstract

The rapid growth of distributed generation brings with it technical and regulatory challenges that need to be properly addressed for system connection. This includes the impact on the distribution network, in some cases changes to transmission lines, reverse current flow and changes to feeders, as well as the need to the eletrical network to accommodate the demand for connection of the UFV. Therefore, the poper performance of the protections is essential to guarantee the safety and operability of the system. This paper present the main elements of substation and,above all, the protection analysis and coordination of parameters required of the connection of a photovoltaic plant with a total capacity of 1.4MWp, with the aim of carrrying out a protection analysis based on the current standards aplicable to the sector, such as DIS-NOR-036 02, Modulo 3 PRODIST and the auxiliary standards provided by ANSI, IEEE and IEC, to coordinate the protection parameters at the system connection point in order to ensure adequate protection and integrity of the electrical system, to generate the data needed to parameterize the protection relay of the photovoltaic plant (UFV), thus guaranteeing the correct operation of the protection device. The study showed that the methods used werw efficient. The data show that coordination with the upstream recloser was achieved, as well as selectivity with the protections covering the short-circuit situations studied and protections related to voltage and frequencies.