Effects of the Insulation Quality on the Frequency Response of Power Transformers
Conference contribution, 2006

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.

transformer insulation

moisture content

insulation modelling

frequency domain spectroscopy

Author

Nilanga Abeywickrama

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Chandima Ekanayake

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Stanislaw Gubanski

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

International Conference on Condition Monitoring and Diagnosis, Korea

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering

More information

Created

10/7/2017