ANÁLISE DA QUALIDADE DA ENERGIA ELÉTRICA EM UMA EMPRESA METALÚRGICA: um estudo de caso

Abstract

Problems related with disturbances at the electrical energy on industries that can result in consequences like: production delays, increase of the electrical bill and also irreversible damage at the network. The objective of this work is to prove the importance of the electrical energy quality at the industries, explain the phenomena that affect it and also perform a conformity analysis of the quality of the electrical energy at a metallurgical company, located in Lambari-MG. For this analysis it will be used the Schneider Energy quality analyzer, model ION 7650, for a total period of 7 days, connected to the company’s electrical network to collect 1008 valid scans in consecutive intervals of 10 minutes, in order to gather measurements of the power factor, harmonic distortions at the tension and voltage sags, to be used for conformity analysis with the reference values defined at module 8 of Electric Energy Distribution Processes at the National Electric System (PRODIST). To solve these problems, it was proposed the installation of a capacitive unity, connected in parallel with the welding machine and also the exchange of the power conductors.