Identificação, mensuração e localização tridimensional de descargas parciais em transformadores de potência com base em resultados de ensaios de emissão acústica

• Ano de defesa: 2014
• Autor(a) principal: Romualdo, Hudson de Paula
• Orientador(a): Brito, Leonardo da Cunha
• Banca de defesa: Brito, Leonardo da Cunha, Menezes, Leonardo Rodrigues Araújo Xavier de, Rocha, Adson Silva, 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: Descargas parciais; Emissão acústica; Identificação; Localização tridimensional; Mensuração; Transformador de potência
• Palavras-chave em Inglês: Partial discharges, ,, , ,; Acoustic emission; Identification; Three-dimensional location; Measurement; Power transformer
• Área do conhecimento CNPq: ENGENHARIA ELETRICA::CIRCUITOS ELETRICOS, MAGNETICOS E ELETRONICOS
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/3864

The presence of partial discharges in power transformer represents a relevant indicator of incipient failure. Partial Discharges are lightning quick and incomplete, intermittent, that in power transformers can be detected by means of some methods, among them, the test of acoustic emission. Currently, the algorithms used by equipment that processes the information from testing of acoustic emission are owners, and thus not available for the scientific community. Still, it is usually not performed the separation of noise detected from partial discharge of the other noises in the results, and little information about the dynamics of the occurrence of noise is presented. In this work, are presented three methods, identification, measurement and three-dimensional location, that foster the development of a computational solution for the diagnosis of power transformers using data derived from testing of acoustic emission with focus on the occurrence of partial discharges, phenomenon harmful to the appropriate functioning of the equipment. After a substantiation based on literature review of the issues dealt with in the course of the study, are described methods for identification of noises coming only from partial discharges, among the total noise (of all kinds), and measurement of these noises and their attributes (already done in a separate manner). Then, reference-if the method for three-dimensional location and, finally, expose-if the results of the application of the methods developed in the form of a case study showing the benefits of the application of the methods described here. Thus Demonstrating the importance of their results in supporting the decision-making process and, consequently, in maintaining the operational condition of power transformers.