Avaliação da qualidade de energia em sistemas industriais: estudo de caso em uma fábrica de embalagens flexíveis

Abstract

The increase in nonlinear loads in industries, as well as disturbances in the supply and internal distribution of electricity, has generated an increase in production costs due to losses in processes and additional charges by energy concessionaires. Thus, in this work, the quality of electricity in a flexible packaging industry was analyzed, verifying the impacts caused by the disturbances and their solutions. The methodology followed the normative criteria of Module 8 of the Distribution Procedures (PRODIST), based on measurements and operational data of the plant. The results indicated voltage fluctuation levels 28% above the normative limit and non-standard power factor at low load times, with an annual cost of R$ 5,673.15. It was also verified that the generation of 4 tons of shavings per year was associated with disturbances, accounting for 8% of the annual energy bill. Finally, it was proposed to automate the capacitor bank and implement an Energy Storage System (BESS) for 15 minutes of autonomy, with a payback of 18 months and 3 years, respectively.