Análise da qualidade da energia elétrica no IFG Campus Goiânia a partir da implementação de projeto de eficiência energética com adição de sistema fotovoltaico

Abstract

The quality of electricity has become one of the most studied subjects in the electricity sector in recent years. The main motivations in researching this theme are supported by the increasing use of loads sensitive to variation in the parameters of the electrical network, causing losses to users and the application of nonlinear devices, which are responsible for the injection of harmonic components of current into the network. In this context, this work has as main objective to carry out a case study with the use of a consolidated method in the literature, which allows the assessment of the power quality before, during, and after the implementation of an energy efficiency project. The study was carried out quantitatively through a case study at the IFG Campus Goiânia facilities. The methodology adopted consists of characterizing harmonic voltage distortions, frequency variation, power factor, Steady-state voltage, and voltage imbalance, through measurement campaigns, to verify whether the electrical installations of the site behave by the limits established by the current standards. Initially carried out the first measurement campaign in the electrical installations of the study site, before the implementation of the energy efficiency project. After that, carried out the second measurement campaign considering all loads together with the implementation of the new lighting system, and finally, the third campaign, which considered all installed loads installed together with the implementation of the photovoltaic system. The results show that in the first and second campaigns the phenomena of product quality remained within the limits established by PRODIST Module 8 and IEEE 519 – 2014. However in the third campaign, a considerable contribution of harmonic distortions of current was identified, and mitigating actions are necessary. From the study, it is concluded that carrying out an analysis of power quality allows identifying the problem and proposing a solution to mitigate possible damage caused to the electrical installations of the building under study.