Desenvolvimento de um sistema de monitoramento e análise online de corrente e tensão

Abstract

This work presents the development of an embedded system for monitoring and analyzing electrical quantities in single-phase alternating current (AC) circuits, with an emphasis on digital signal acquisition and processing. The hardware architecture is based on the ESP32-C6 microcontroller integrated with the BL0942 energy measurement circuit. For instrumentation purposes, a nonintrusive current sensor (PZKHCT) and a voltage sensor (ZMPT101B) were employed, whose signals undergo analog conditioning and filtering stages prior to digitization.Data acquisition is performed continuously, enabling the calculation of active, reactive, and apparent power, as well as the power factor. Experimental validation included comparison of the acquired signals with reference instruments, such as an oscilloscope and a multimeter, in addition to spectral analysis using the Fast Fourier Transform (FFT). This procedure allowed the verification of waveform f idelity, the analysis of harmonic distortions, and the identification of peak values, demonstrating the usefulness of the proposed solution for residential energy monitoring applications.