Falhas e defeitos ocorridos em transformadores de potência do sistema elétrico da Celg, nos últimos 28 anos: um estudo de caso
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2008-08-20
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Universidade Federal de Goiás
Resumo
Power transformers have a fundamental role in an electrical power system, in addition to representing a significant amount of investment required for the implantation of this system. To reduce the costs associated with a transformer s life cycle and to guarantee its reliability and durability, it is essential to monitor its operating conditions, its insulation system as well as the working conditions of its accessories and other components. Therefore, the aim of this work is to study the faults and defects that occur in power transformers of 34.5kV, 69kV, 138kV, and 230kV of Celg s electrical system, the latter being a highly important electric energy concessionaire in Goiás State, Brazil. The results of this
study corroborate its contributions to the field, namely, the efficacy of the predictive technique in the maintenance area during the last twenty-eight years (from 1979 to 2007), the
characterization of faults and defects during this period, and the presentation of proposals to implement improvements in the predictive technique, in order to reduce the number of
interruptions in the electrical power system.
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SOUZA, Denise Cascão Poli. Faults and damage occurring in power transformers Celg electrical system in the last 28 years: a case study. 2008. 103 f. Dissertação (Mestrado em Engenharia) - Universidade Federal de Goiás, Goiânia, 2008.