Projeto de dispositivo para monitoramento da corrente em redes de distribuição de baixa tensão

Abstract

Electrical Energy is present in almost every Brazilian home, being essential to the modern life. Nevertheless, the electrical grid is not safe from faults, being susceptible to interruptions. Whereas the generation and transmission of electrical energy are extensively monitored, since problems on these can lead to interruption of the energy supply to whole states or even a vast part of the country, distribution grids do not receive the same treatment, being only partially monitored, what can be partially related to the high cost of monitoring equipment. Thus, this work proposes a tool for monitoring of the values of current of distribution transformers of easy and inexpensive implementation. Guaranteeing the current measurement in non-invasive manner, through the use of linear Hall effect sensors. These sensors are capable of measuring the magnetic field generated by the current circulating on the cables and converting the measurements to voltages which can be conveniently measured and analysed by a microcontroller.