Relatório de Estágio Supervisionado.

Abstract

This report describes the activities carried out during the supervised internship at Acumuladores Moura S.A., through Virtus-CC, in partnership with the Federal University of Campina Grande (UFCG). The internship comprised 270 hours distributed between on-site activities at Moura’s industrial unit in Belo Jardim–PE, and technical activities at the Laboratory of Industrial Electronics and Machine Drives (LEIAM). The activities included familiarization with the industrial environment, monitoring the production processes of lead–acid and lithium-ion batteries, and performing analyses related to Battery Energy Storage Systems (BESS), such as economic viability studies for tariff arbitrage applications and the development of a proposal to supply a hospital operating in island mode. Experimental tests were also conducted at the ITEEM Power Laboratory, covering black start procedures, grid formation, droop control operation, and transitions between grid-following and grid-forming modes. Additionally, simulations were implemented in MATLAB/Simulink to evaluate active islanding detection strategies, including power injection, AFD, SFS, and SMS techniques. The activities enabled the integration of theoretical knowledge with practical experience, enhancing understanding of microgrids, power electronics, energy storage, and industrial processes.