Diagnóstico otimizado de transformadores de potência mediante a integração de técnicas preditivas
Nenhuma Miniatura disponível
Data
2018-02-22
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
The effective application of predictive maintenance techniques for power transformers is
essential for the early detection of defects and failures, and in order to trigger scheduled
preventive or corrective actions. This precludes the need for urgent and/or emergency
interventions, aiming to reduce unscheduled power outages, which are usually more costly
and cause great inconvenience to consumers and the electric power system. In this context,
this work focuses on the development of an optimized diagnostic methodology for power
transformers, by integrating eleven predictive techniques (with 27 quantities). These
techniques are analyzed with respect to voltage level, type of electrical connection and age
of the transformers – when applicable –, based on the experience of specialists/analysts, on
standards and technical guidelines, and on statistical analyses of a database of actual field
and laboratory tests. The analyses of the validation of the results are significant and
presented through a specialized system, demonstrating their practical application. The
novelty of this thesis consists in the development of an original classification method, called
Normalized Doubly Weighted Sum (NDWS), and in the detailed description of the predictive
techniques that are integrated, their functionalities, the creation of equations, the definition
of criteria and parameters, with their weights and scores for the classification of “A”
(excellent) to “E” (very poor), and recommended actions aimed at underpinning decision-
making, thereby contributing to the body of studies in this field. Hence, it can be concluded
that this work offers a comprehensive and efficient tool to aid in the optimized diagnosis of
power transformers, insulated with kraft paper and immersed in mineral insulating oil,
providing effective diagnostics and maintenance of these devices, and thus increasing the
reliability of electric power systems.
Descrição
Citação
MARQUES, André Pereira. Diagnóstico otimizado de transformadores de potência mediante a integração de técnicas preditivas. 2018. 190 f. Tese (Doutorado em Engenharia Elétrica e da Computação) - Universidade Federal de Goiás, Goiânia, 2018.