Projeto preliminar de um protótipo para análise da qualidade de energia elétrica de baixo custo

Abstract

This work presents the development of a portable prototype for measuring power quality in residential environments, focusing on compliance with the guidelines established by Module 8 of ANEEL’s PRODIST. The device is based on the ESP32 microcontroller and employs signal conditioning circuits, consisting of resistive voltage dividers and shunt resistors, to perform direct voltage and current measurements from standard electrical outlets. Once the analog signals are acquired, the microcontroller carries out analog-to-digital conversion and applies specific algorithms to compute indicators such as the Positive Reference Deviation (PRD) and Central Reference Deviation (CRD), which reflect waveform distortions and variations in the power supply. The project aims to combine electronic robustness, ease of operation, and low cost, favoring its application in inspections, preventive maintenance, and energy efficiency studies in small-scale installations. Furthermore, the system’s modular architecture enables the transmission of processed data to cloud servers, allowing for real-time remote monitoring. The results demonstrate the technical feasibility of the proposed solution and its potential for practical application, contributing to the democratization of access to power quality measurement instruments, which are traditionally limited to industrial or laboratory environments.