Modelagem e análise da proteção anti-ilhamento de geradores distribuídos térmicos e fotovoltaicos

Abstract

This paper presents an analysis of the anti-islanding protection (AIP) functions behavior during the islanded operation of a distribution network section that contains simul- taneously distributed generators interfaced by inverters and directly connected to the grid via synchronous generator. Through the simulations carried out, it was verified that the tripping time of traditional passive islanding detection functions is significantly affected when there are synchronous generators connected to the island. This is due to the existence of a synchronous, although weak, reference for the photovoltaic generator, extending its islanded operation. It was also verified the need for greater care in the parameterization of AIP functions as well as the complementation of more robust and sensitive detection functions in order to ensure greater network reliability and security.