Identificação, mensuração e localização tridimensional de descargas parciais em transformadores de potência com base em resultados de ensaios de emissão acústica
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Data
2014-02-27
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Universidade Federal de Goiás
Resumo
The presence of partial discharges in power transformer represents a relevant indicator of
incipient failure. Partial Discharges are lightning quick and incomplete, intermittent, that in
power transformers can be detected by means of some methods, among them, the test of
acoustic emission. Currently, the algorithms used by equipment that processes the information
from testing of acoustic emission are owners, and thus not available for the scientific
community. Still, it is usually not performed the separation of noise detected from partial
discharge of the other noises in the results, and little information about the dynamics of the
occurrence of noise is presented. In this work, are presented three methods, identification,
measurement and three-dimensional location, that foster the development of a computational
solution for the diagnosis of power transformers using data derived from testing of acoustic
emission with focus on the occurrence of partial discharges, phenomenon harmful to the
appropriate functioning of the equipment. After a substantiation based on literature review of
the issues dealt with in the course of the study, are described methods for identification of
noises coming only from partial discharges, among the total noise (of all kinds), and
measurement of these noises and their attributes (already done in a separate manner). Then,
reference-if the method for three-dimensional location and, finally, expose-if the results of the
application of the methods developed in the form of a case study showing the benefits of the
application of the methods described here. Thus Demonstrating the importance of their results
in supporting the decision-making process and, consequently, in maintaining the operational
condition of power transformers.
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ROMUALDO, Hudson de Paula. Identificação, mensuração e localização tridimensional de descargas parciais em transformadores de potência com base em resultados de ensaios de emissão acústica. 2014. 123 f. Dissertação (Mestrado em Engenharia Elétrica e da Computação) - Universidade Federal de Goiás, Goiânia, 2014.