Desenvolvimento de um dispositivo eletrônico para a medição de distorção harmônica conforme a norma iec 61000-4-7

Abstract

The harmonic distortion affects directly the power quality, which loads will be fed. Harmonic damages in motors and electric generators, which are rotating machines (induction and synchrony), are the increase in the heating due to the increase of losses on iron and copper, besides the increase of audible volume. The purpose of this project is to develop an prototype capable of measuring harmonics in real time according to IEC 61000-4-7 rule - Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto. For this project, a power quality monitoring integrated circuit - ADE9000 will be used, which will be responsible for sampling 12 cycles of 60Hz with 128 samples per cycle, and a microcontroller, which will communicate via SPI with the ADE9000 to obtain the waveform and make the fast Fourier transform processing, obtaining the harmonics of the three-phase voltage and current, sending to the computer, where the harmonic graphs will be shown.