Metodologia Fuzzy aplicada ao triângulo de Duval para o diagnóstico de transformadores de potência por meio de análise de gases dissolvidos
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2017-02-17
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Universidade Federal de Goiás
Resumo
Power transformers are essential equipment in eletric systems. Considered as highly
expensive equipment it requires greater attention regarding the occurrence of failures.
A failure on equipment can cause serious trouble to the concessionaire responsible
for the generation, transmission and distribution of energy. In the present scenario,
where legislation has increased the severity with which oversees these failures and
demanding a higher efficiency of the same, it is necessary to create appropriate policies
to investigas possible equipment failure. These failures can be caused by several factors,
among them, the gases dissolved in the oil due to its degeneration. One of the most
used techniques for the diagnosis of power transformers from these dissolved gases
is the Duval Triangle, a method that has a precision and considerably high reliability.
However, for proper planning of maintenance, avoiding a possible sudden withdrawal
and supply cut, it is necessary to provide further information, including a quantitative
analysis of the causes of failure and a history of the evolution of the operating status
of the machine. To this end it is proposed to use a fuzzy logic by the method of Duval
to provide an analysis of the transitions between the diagnostic originally presented to
enable monitor the level of relevance of each possible cause for the diagnosis equipment
allowing perform scheduled and preventive maintenance. The proposed methodology
was validated using real data equipment in operation in the brazilian electric system.
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VELOSO, D. P. Metodologia Fuzzy aplicada ao triângulo de Duval para o diagnóstico de transformadores de potência por meio de análise de gases dissolvidos. 2017. 75 f. Dissertação (Mestrado em Engenharia Elétrica e da Computação) - Universidade Federal de Goiás, Goiânia, 2017.