Uma metodologia para monitoramento das condições operativas de transformadores de potência e análise de tendências baseada em lógica fuzzy

• Ano de defesa: 2010
• Autor(a) principal: Nascimento Júnior, Newton Teixeira do
• Orientador(a): SAAVEDRA MENDEZ, Osvaldo Ronald
• Banca de defesa: Pessanha, José Eduardo Onoda
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Maranhão
• Programa de Pós-Graduação: PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA DE ELETRICIDADE/CCET
• Departamento: Engenharia
• País: BR
• Palavras-chave em Português: Análise de tendências; Condições operacionais; Modelagem fuzzy; Monitoramento de equipamentos elétricos de potência; Transformadores de potência
• Palavras-chave em Inglês: Analyze of trends; Operational conditions; Fuzzy modeling; On-Line monitoring electrical equipments; Power transformers
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::SISTEMAS ELETRICOS DE POTENCIA
• Link de acesso: http://tedebc.ufma.br:8080/jspui/handle/tede/452

This paper presents a computational method to monitor the operating state of steady electric power transformers in a real time and perspectives of operation over time trends and their operation. The methodology consists of two main steps. The first step is building composed of a block of fuzzy inference s block that can monitor real-time values of transformer s electrical parameters of the transformer (current, voltage between phases, power, oil temperature, winding temperature), to analyze and map these inputs into a single output that reflects what has been defined as operational status of the transformer. We defined five regions of transformer s operation by which a processor can work: emergency, urgent, warning, stable and great. The second step analyze the trend of increase / decrease of operating state obtained from the fuzzy block in a given period, as one day, a month, one year and / or several years. This trend can be characterized in various ways, such as increasing, decreasing very constant. Statistical methods are employed for this analysis. The methodology was evaluated on a database of a large company of generation and transmission of electric energy from the Brazilian electricity sector. The results were satisfactory in that the development of operation of such equipment was qualitatively mapped and their tendencies well characterized. Conceptually, the analytical model presented can be extended to multiple processing units, electric and other functions for up to a full network of interest, allowing subsidize the operation of this and can indicate the need for any future system reinforcements.