On the use of monopole antennas for determining the effect of the enclosure of a power transformer tank in partial discharges electromagnetic propagation

Albarracin Sanchez, Ricardo; Ardila-Rey, Jorge Alfredo y Mas’ud, Abdullahi Abubakar (2016). On the use of monopole antennas for determining the effect of the enclosure of a power transformer tank in partial discharges electromagnetic propagation. "Sensors", v. 16 (n. 2); pp. 148-165. ISSN 1424-8220. https://doi.org/10.3390/s16020148.

Descripción

Título: On the use of monopole antennas for determining the effect of the enclosure of a power transformer tank in partial discharges electromagnetic propagation
Autor/es:
  • Albarracin Sanchez, Ricardo
  • Ardila-Rey, Jorge Alfredo
  • Mas’ud, Abdullahi Abubakar
Tipo de Documento: Artículo
Título de Revista/Publicación: Sensors
Fecha: Enero 2016
Volumen: 16
Materias:
Palabras Clave Informales: Power transformer tank; VHF and UHF sensors; Monopole antennas; Partial discharges; Condition monitoring
Escuela: E.T.S.I. Diseño Industrial (UPM)
Departamento: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A well-defined condition-monitoring for power transformers is key to implementing a correct condition-based maintenance (CBM). In this regard, partial discharges (PD) measurement and its analysis allows to carry out on-line maintenance following the standards IEC-60270 and IEC-60076. However, new PD measurements techniques, such as acoustics or electromagnetic (EM) acquisitions using ultra-high-frequency (UHF) sensors are being taken into account, IEC-62478. PD measurements with antennas and the effect of their EM propagation in power transformer tanks is an open research topic that is considered in this paper. In this sense, an empty tank model is studied as a rectangular cavity and their resonances are calculated and compared with their measurement with a network analyser. Besides, two low cost improved monopole antennas deployed inside and outside of the tank model capture background noise and PD pulses in three different test objects (Nomex, twisted pair and insulator). The average spectrum of them are compared and can be found that mainly, the antenna frequency response, the frequency content distribution depending on the PD source and the enclosure resonances modes are the main factors to be considered in PD acquisitions with these sensors. Finally, with this set-up, it is possible to measure PD activity inside the tank from outside.

Más información

ID de Registro: 48832
Identificador DC: http://oa.upm.es/48832/
Identificador OAI: oai:oa.upm.es:48832
Identificador DOI: 10.3390/s16020148
URL Oficial: http://www.mdpi.com/1424-8220/16/2/148
Depositado por: Memoria Investigacion
Depositado el: 21 Dic 2017 08:42
Ultima Modificación: 21 Dic 2017 08:42
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