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Effects of the Insulation Quality on the Frequency Response of Power Transformers

Nilanga Abeywickrama (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Chandima Ekanayake (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Stanislaw Gubanski (Institutionen för material- och tillverkningsteknik, Högspänningsteknik)
International Conference on Condition Monitoring and Diagnosis, Korea (2006)
[Konferensbidrag, övrigt]

This paper presents results of frequency domain spectroscopy (FDS) measurements on oil-impregnated pressboard insulation, their analyses and use of the data for modelling high frequency response (FRA) of transformers. The dielectric responses were measured in a broad frequency range, i.e. from 0.1 mHz to 1 MHz, on model samples containing different amount of moisture. The responses were parameterised with terms representing dc conductivity, low frequency dispersion and Cole-Cole polarisation mechanisms and they were thereafter used to model the FRA response of a three-phase transformer.

Nyckelord: frequency domain spectroscopy, insulation modelling, moisture content, transformer insulation



Denna post skapades 2006-09-12. Senast ändrad 2007-11-19.
CPL Pubid: 19965

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Högspänningsteknik

Ämnesområden

Elkraftteknik

Chalmers infrastruktur