Análise e controle de distorções harmônicas utilizando modelagem com filtros passivos

Abstract

With the evolution of power electronics for the control and optimization of industrial flows and processes, challenges related to the quality of electrical energy have become more prominent, especially harmonic distortion. Therefore, understanding the main causes, impacts, and fundamental mitigation strategies becomes crucial to ensure that an electrical system operates with maximum quality and efficiency. In industrial environments, where frequency inverters are used for motor control and nonlinear rectifiers are employed to convert alternating current into direct current to power a variety of electronic devices, the presence of distorted content in current and voltage signals has become increasingly common. These distortions can result in problems such as overheating of transformers and cables, failures in sensitive electronic equipment, among other disturbances. Thus, this work proposes a theoretical

and simulated study on harmonic distortions present in a load with a three- phase rectifier, with a focus on the application of a passive shunt filter to

attenuate the harmonic content of the system. The use of passive filters offers a significant cost-benefit ratio, as the investment required for their implementation is relatively low compared to other approaches. Additionally, these filters have the ability to select and eliminate specific harmonics, which were previously calculated in the design phase. With the completion of this study, the aim is to achieve a system with controlled harmonic indices, thus validating the effectiveness of the methodology under analysis.