Estudo de proteção da rede elétrica do Campus do Pici da Universidade Federal do Ceará com integração de uma usina fotovoltaica

Abstract

The use of Distributed Generation (DG) units has grown significantly in recent years. The inclusion of these units in electrical power systems needs to be evaluated from the power flow, short circuit and protection studies, considering that they can affect their correct functioning. In this context, this work aims to present the study of the protections of the substation, the distribution network and the connection point of a Photovoltaic (PV) Plant of 2.5 MVA hypothetically installed in the electrical network of the distribution system of the Pici campus of the Federal University of Ceará. To this end, a survey of the system data was carried out to then, with the help of the MathCAD software, conduct the short circuit study of the system without the PV plant. A simulation was performed in the EasyPower software to obtain the system’s short circuit data with the inclusion of the PV plant. Based on the data and the results obtained from the short circuit calculations and simulations, the Pici campus’ distribution system protection study was performed with and without the PV plant. As a result of the conducted studies, coordination was ensured between the system’s relays and reclosers to both case studies, in addition to observing that, even with the inclusion of the PV plant in the distribution of the Pici campus, there is no need to change the protection settings of the system equipment.