Banca de QUALIFICAÇÃO: WILLDEMBERG INÁCIO DUARTE DE MELO

AUTOMATIC ELECTRICAL POWER RECOMPOSITION SYSTEM POWERED FROM THE USE OF
STATIONARY BATTERIES

Automatic power restoration; emergency loads; battery storage; low voltage islanding.

Although electric power companies increasingly seek to adhere to the quality energy indicators required by the National Electric Energy Agency, it is a fact that there are regions, both in Brazil and abroad, where power outages have caused inconvenience to the population. The objective of this study is to present a device capable of mitigating this problem, through the organization and integration of various electrical components available in the market. This device, when organized, constitutes an emergency circuit for automatic power restoration, powered by the use of stationary batteries, aligning with the theories of medium and low voltage electrical microgrids, enabling the provision of emergency loads (Costa et al., 2018; Felipe, 2022; Ju et al., 2018; Silveira Junior, 2022; Li et al., 2017). The product has been implemented in a residence to partially supply power during interruptions from the electric power utility, aiming to ensure continuous supply of essential devices for user well-being, health, and communication, as well as to collect data for more accurate sizing. To refine the device's sizing, the quality indicators DEC and FEC of each region are used, which allow for mathematical modeling to approximate the real consumption of emergency loads by the consumer unit. This is crucial for storing and using accumulated energy more efficiently. This device resembles an off-grid system; however, it is automated, and its function is activated in the event of a power outage. As a conclusion, the importance of residences having emergency systems that operate in an isolated and sustainable manner for users, such as those requiring home care, remote work, and others, is highlighted.