A complex permittivity based sensor for the electrical characterization of high-voltage transformer oils

Dervos, CT; Paraskevas, CD; Skafidas, PD; Vassiliou, P

dc.contributor.author	Dervos, CT	en
dc.contributor.author	Paraskevas, CD	en
dc.contributor.author	Skafidas, PD	en
dc.contributor.author	Vassiliou, P	en
dc.date.accessioned	2014-03-01T02:43:01Z
dc.date.available	2014-03-01T02:43:01Z
dc.date.issued	2005	en
dc.identifier.issn	1424-8220	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31195
dc.subject	Dielectric spectroscopy	en
dc.subject	Insulation aging	en
dc.subject	Polarization effects	en
dc.subject	Tanδ	en
dc.subject	Transformer oils	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Electrochemistry	en
dc.subject.classification	Instruments & Instrumentation	en
dc.subject.other	POWER TRANSFORMERS	en
dc.subject.other	DIAGNOSTICS	en
dc.subject.other	INSULATION	en
dc.subject.other	FREQUENCY	en
dc.subject.other	EQUIPMENT	en
dc.subject.other	PAPER	en
dc.title	A complex permittivity based sensor for the electrical characterization of high-voltage transformer oils	en
heal.type	conferenceItem	en
heal.identifier.primary	10.3390/s5040302	en
heal.identifier.secondary	http://dx.doi.org/10.3390/s5040302	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	This work investigates the use of a specially designed cylindrical metal cell, in order to obtain complex permittivity and tanδ data of highly insulating High Voltage (HV) transformer oil samples. The data are obtained at a wide range of frequencies and operation temperatures to demonstrate the polarization phenomena and the thermally stimulated effects. Such complex permittivity measurements may be utilized as a criterion for the service life prediction of oil field electrical equipment (OFEE). Therefore, by one set of measurements on a small oil volume, data may be provided on the impending termination, or continuation of the transformer oil service life. The oil incorporating cell, attached to the appropriate measuring units, could be described as a complex permittivity sensor. In this work, the acquired dielectric data from a great number of operating distribution network power transformers were correlated to corresponding physicochemical ones to demonstrate the future potential employment of the proposed measuring technique. © 2005 by MDPI.	en
heal.publisher	MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL	en
heal.journalName	Sensors	en
dc.identifier.doi	10.3390/s5040302	en
dc.identifier.isi	ISI:000231155500019	en
dc.identifier.volume	5	en
dc.identifier.issue	4-5	en
dc.identifier.spage	302	en
dc.identifier.epage	316	en