Estimação relativa de tempo de vida de transformadores de distribuição, considerando cargas não lineares

• Ano de defesa: 2014
• Autor(a) principal: Santos, Adriano Machado dos
• Orientador(a): Machado, Paulo César Miranda
• Banca de defesa: Machado, Paulo César Miranda, Medeiros, Carlos Augusto Guimarães, Oliveira, Antônio Melo de, Santos, Euler Bueno dos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Engenharia Elétrica e da Computação (EMC)
• Departamento: Escola de Engenharia Elétrica, Mecânica e de Computação - EMC (RG)
• País: Brasil
• Palavras-chave em Português: Transformador de distribuição; Carga não linear; Perdas em transformador; Temperatura de operação; Perda de vida percentual; Distribution transformers; Nonlinear load; Transfomer losses; Operational temperature; Percent loss of life
• Área do conhecimento CNPq: ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/4927

Electricity customers’ devices, connected to the secondary distribution network linked to distribution transformers belonging to the electrical energy distributor, modernize every year. These devices usually consist of components capable of processing energy and produce distortion at the load current. Thus these devices are typified as non-linear load and its effects influence the operation of the distribution transformers with implications for its lifetime. Therefore, this work presents the study of the influence of non-sinusoidal signals (distorted signals) in the lifetime of distribution transformers. In this sense equations are presented that allows to calculate transformers losses, their operating temperatures and estimate the percentage loss of life. To obtain results a computer program was developed in the numerical programming platform MATLAB based on the presented mathematical model. The developed program is supplied by data obtained from field as well as laboratory measurements. Results are also obtained by simulations. The focus of this study is the distribution system of the urban perimeter of the city Goiânia-GO.