Projeto e implementação de um analisador de energia digital para ensaio de transformadores elétricos

Abstract

This Project addresses the design of a digital power analyzer capable of conducting electrical measurements on transformers under testing. The aforementioned transformers undergo testing at the Laboratory of Medium Voltage Tests (INRIMT) within the Institute of Intelligent Networks (INRI) at the Federal University of Santa Maria (UFSM). The digital power analyzer is designed to have a minimum resolution of 20 bits, a high sampling rate, and high accuracy, aiming for the best cost-benefit ratio with respect to component availability in the market. This circuit will be embedded on a printed circuit board (PCB) capable of reading the voltage and current applied to the transformer, with protection stages against overvoltages and overcurrents and filters against electromagnetic noise. The project development utilizes the PSIM®, LTspice, Octave, KiCAD, and Visual Studio programs. The PCB will incorporate a microcontroller responsible for processing the data and sending it to a computer via USB, where a program will perform calculations and display values of average and effective voltages and currents, active, reactive, and apparent powers, power factor, and harmonic distortion rate.