Análise de distorções harmônicas na rede de distribuição de baixa tensão do Bairro de Kumbeza

Abstract

The present work describes the analyzes and causes of harmonic distortions of the Kumbeza neighborhood, which has been creating disorders in the mains. In this way, the main factors of harmonic occurrence were analysed, as well as analysis of the mitigation mechanisms of risk and indicators that cause the irregularity in the supply of electricity in this neighbourhood. This study was done based on the collection of information in the field and bibliographies as well as the visual inspection of the state of the network. The harmonic content created by the equipment of the users, and this created the total PF reduction, because with de addition of harmonics, a certain current didtortion, there is a stream of current in the effective value and a decrease in the power. This high distorction, gave rise to the wear of the PT 322R under study, in such a way that the buses sre super heated, the fuses with bad visual aspect due deteriation of the fuse and cartridge bases, in the same way the neutral conductor`s insulation and wear loss. As a way of mitigating this problem, created by excessive use of non-linear loads, such as fluorescente lamps, cooling and air conditioning equipment, computers and more equipment described in chapter 3. The result this provides the answer, the equipotencialization of grounding systems so that capacitive coupling does not occur. Installing harmonic filters AFQevo active multifunctional model on the side closest to the oud and a contractual model was proposed, were the customer is charged a fine when using undeclared equipment in the electrical project which EDM has approved as being within the harmonic limits of the current standards, in cases where the client receives a distorted tension that violates the reliability set in the contract, the customer will have The right requires the replacement of damage and correction of the problem.