Uma contribuição computacional para a análise da migração de umidade em sistemas isolantes papel- óleo de transformadores de potência

• Ano de defesa: 2016
• Autor(a) principal: Sousa, Felipe Resende de Carvalho
• Orientador(a): Brito, Leonardo da Cunha
• Banca de defesa: Brito, Leonardo da Cunha, Carvalho Júnior, Carlos Alberto Tenório de, Ribeiro, Cacilda de Jesus
• 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: Manutenção; Método das diferenças finitas; Óleo; Papel; Programação genética; Sistema isolante; Transformadores de potência; Umidade
• Palavras-chave em Inglês: Finite difference method; Genetic programming; Insulating systems; Maintenance; Moisture; Oil; Paper; Power transformers
• Área do conhecimento CNPq: ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/6427

Prediction ofmoisture levels inside power transformers shown itselfas an important technique for maintenance engineering, because in addition to being associated with the useful life of equipment, it also provides arguments for decision making about intervention in them. Despite concerns about water in transformers existed for over half a century, the monitoring of this variable is still done in a simply way, given little information to weave a diagnosis, which can lead to superficial interpretations of equipment, and therefore, the misdiagnosis. Given such a scenario, this work aims to obtain an equation that models classical curves relative to moisture in transformers, as well as the development of a mathematical model that simulates water migration inside these equipments. For this purpose, computational techniques and numerich methods are used. Thus, the main contribution of this work is to optimize the above diagnostic process. During the work a literature review of the subject is presented, with further explanations of the mathematical tools used. To prove the effectiveness of the project presented, case studies with data from energized power transformers are analysed. Some values found in other works are also uses to validate the work. Ending with some conclusions, this paper proves that the use of the approach presented here is effective, and its application is fundamental in the area of maintenance engineering.