Metodologia para determinação das variações de tensão de curta duração e definição das áreas de vulnerabilidade

Abstract

In the context of Electric Power Quality, studies related to Short-Duration Voltage Variations should be highlighted, with emphasis on voltage sags. These phenomena are related to the manifestation of adverse events in the form of short circuits, large motor starters, insertion or withdrawal of large loads, among others. These disturbances can bring major operational impacts and enormous financial losses in industrial consumer units, since important productive chains can be interrupted due to their sensitivities to the phenomenon in question. Given this reality, great efforts are made to determine, a priori, the effects linked to the phenomenon discussed here, and, from this knowledge, to define strategies to mitigate impacts and, thus, to avoid negative effects in the form of physical damage and process stops. In this context, this course completion work aims to address the issue, with emphasis on the characterization of a method of analysis applicable to the matter, and also, based on a typical electrical complex, to illustrate the procedure used to determine the most vulnerable areas to the phenomena contemplated here.