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Previous issue date: 2008-10-13 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Post dispatch analysis of signals obtained from digital disturbances registers provide important information to identify and classify disturbances in systems, looking
for a more efficient management of the supply. In order to enhance the task of identifying and classifying the disturbances - providing an automatic assessment
- techniques of digital signal processing can be helpful. The Wavelet Transform has become a very efficient tool for the analysis of voltage or current signals, obtained immediately after disturbance s occurrences in the network. This work presents a methodology based on the Discrete Wavelet Transform to implement this process. It uses a comparison between distribution curves of signals energy, with and without disturbance. This is done for different resolution
levels of its decomposition in order to obtain descriptors that permit its classification, using artificial neural networks / An?lises p?s-despacho de sinais oriundos de registradores de perturba??es fornecem muitas vezes informa??es importantes para identifica??o e classifica??o de dist?rbios nos sistemas, visando a uma gest?o mais eficiente do fornecimento de
energia el?trica. Para auxiliar nessa tarefa, faz-se necess?rio recorrer a t?cnicas de processamento de sinais, a fim de automatizar o diagn?stico sobre os tipos de dist?rbio presentes nos sinais registrados. A transformada wavelet constitui-se em uma ferramenta matem?tica bastante eficaz na an?lise de sinais de tens?o ou corrente, obtidos imediatamente ap?s a ocorr?ncia de dist?rbios na rede. Este
trabalho apresenta uma metodologia baseada na transformada wavelet discreta e na compara??o de curvas de distribui??o da energia de sinais, com e sem dist?rbio, para diferentes n?veis de resolu??o de sua decomposi??o, com o objetivo
de obter descritores que permitam a sua classifica??o atrav?s do uso de redes neurais artificiais
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15119 |
| Date | 13 October 2008 |
| Creators | Santos, Crisluci Karina Souza |
| Contributors | CPF:09615687472, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781378J1, Oliveira, Jos? Tavares de, CPF:05768632468, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780328Y8, Bezerra, Ubiratan Holanda, CPF:04230000200, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787768D6, Souza, Benemar Alencar de, CPF:13253298434, http://lattes.cnpq.br/4987294390789975, Melo, Jorge Dantas de, CPF:09463097449, http://lattes.cnpq.br/7325007451912598, Leit?o, Jos? J?lio de Almeida Lins, CPF:14700204400, http://lattes.cnpq.br/5560023605852197, Medeiros J?nior, Manoel Firmino de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia El?trica, UFRN, BR, Automa??o e Sistemas; Engenharia de Computa??o; Telecomunica??es |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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