A Comparative Analysis Applied to the Partial Discharges Identification in Dry-Type Transformers by Hall and Acoustic Emission Sensors

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidad Técnica Federico Santa María-
Autor(es): dc.creatorde Castro, Bruno Albuquerque-
Autor(es): dc.creatorDos Santos, Vitor Vecina-
Autor(es): dc.creatorLucas, Guilherme Beraldi-
Autor(es): dc.creatorArdila-Rey, Jorge Alfredo-
Autor(es): dc.creatorRiehl, Rudolf Ribeiro-
Autor(es): dc.creatorAndreoli, André Luiz-
Data de aceite: dc.date.accessioned2025-08-21T17:48:54Z-
Data de disponibilização: dc.date.available2025-08-21T17:48:54Z-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-03-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3390/s22051716-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/234173-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/234173-
Descrição: dc.descriptionDry-type insulated transformers stand out for their higher applicability in substations, high-voltage instrumentation systems, and electrical installations. In this machine, the insulation system is constituted of dielectric materials such as epoxy resin and Nomex paper. Some critical issues in the operation of this equipment, such as overload, moisture, or heat, can induce a slow degradation of the physical–chemical properties of the dielectric materials, which can culminate in the total failure of the transformer. However, before the transformer’s shutdown, it is common to detect discharge activity in the insulation system. Based on this issue, this work proposes an experimental and comparative analysis between acoustic emission and Hall-effect sensors, aiming at differentiating discharges in epoxy resin and Nomex paper, materials that constitute the insulation of the dry-type insulated transformers. Two signal processing techniques were studied: traditional frequency analysis and discrete wavelet transform. The objective is to develop signal processing techniques to differentiate each type of discharge since different discharges require different maintenance actions. The results obtained indicate that acoustic emission sensors and Hall sensors are promising in differentiating discharge in epoxy resin and Nomex paper. Furthermore, the pattern recognition tools presented by this work, which associated the wavelet levels energies and the energy of the full signals with the average band and the equivalent bandwidth, were effective to perform feature extraction of power transformer condition.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDepartment of Electrical Engineering School of Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionDepartment of Electrical Engineering Universidad Técnica Federico Santa María, Av. Vicuña Mackenna 3939-
Descrição: dc.descriptionDepartment of Electrical Engineering School of Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionFAPESP: 2020/11035-3-
Idioma: dc.languageen-
Relação: dc.relationSensors-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAcoustic emission-
Palavras-chave: dc.subjectDry-type insulated transformers-
Palavras-chave: dc.subjectHall-effect sensors-
Palavras-chave: dc.subjectPartial discharges-
Palavras-chave: dc.subjectPattern recognition-
Título: dc.titleA Comparative Analysis Applied to the Partial Discharges Identification in Dry-Type Transformers by Hall and Acoustic Emission Sensors-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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