dc.contributor | Cardoso Junior, Ghendy | |
dc.contributor | http://lattes.cnpq.br/6284386218725402 | |
dc.contributor | Moreira, Fernando Augusto | |
dc.contributor | http://lattes.cnpq.br/8068628216980918 | |
dc.contributor | Marchesan, Gustavo | |
dc.contributor | http://lattes.cnpq.br/4254867243649147 | |
dc.contributor | Gutierres, Luiz Fernando de Freitas | |
dc.contributor | http://lattes.cnpq.br/8846358506427099 | |
dc.contributor | Morais, Adriano Peres de | |
dc.contributor | http://lattes.cnpq.br/2780595038162903 | |
dc.creator | Marques, Jeferson Prates | |
dc.date.accessioned | 2019-03-25T15:08:51Z | |
dc.date.available | 2019-03-25T15:08:51Z | |
dc.date.created | 2019-03-25T15:08:51Z | |
dc.date.issued | 2018-08-28 | |
dc.identifier | http://repositorio.ufsm.br/handle/1/15955 | |
dc.description.abstract | This thesis presents the development of a methodology for the detection and
classification of electrical transients in power transformers, for protection purposes. For this,
we analyzed several electrical transients involving the power transformers, in order to
distinguish the different types of internal faults of the inrush current. The methodology was
validated through a test system implemented in the ATP/EMTP software. From this,
simulation data were acquired considering several operating conditions of the power
transformer. The developed methodology monitors and analyzes the Detail Coefficients (CD)
for different levels of decomposition by the Discrete Wavelet Transform of the differential
current. The method extracts the characteristics and calculates the variation of the CD levels
for the classification of transients. The results showed that during the internal fault conditions
the CD presents high and constant peak values, different from what happens in other
transients. The methodology proposed in this work is able to identify and correctly
discriminate the internal fault conditions of other transients. This property makes the
proposed method promising for power transformer protection purposes. | |
dc.publisher | Universidade Federal de Santa Maria | |
dc.publisher | Brasil | |
dc.publisher | Engenharia Elétrica | |
dc.publisher | UFSM | |
dc.publisher | Programa de Pós-Graduação em Engenharia Elétrica | |
dc.publisher | Centro de Tecnologia | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.subject | Proteção de transformadores de potência | |
dc.subject | Proteção diferencial | |
dc.subject | Correntes de Inrush | |
dc.subject | Falta interna | |
dc.subject | Transformada wavelet discreta | |
dc.subject | Power transformer protection | |
dc.subject | Differential protection | |
dc.subject | Inrush currents | |
dc.subject | Internal fault | |
dc.subject | Discrete wavelet transform | |
dc.title | Metodologia para detecção e classificação de faltas em transformadores de potência por meio da Transformada Wavelet Discreta | |
dc.type | Tese | |