Journal article
Investigation of propagation of partial discharges in power transformers and techniques for locating the discharge
IEE Proceedings - Science, Measurement and Technology, Vol.152(1), pp.25-30
2005
Abstract
The location of partial discharges in a power transformer can be determined based on the characteristics of the transfer function from the discharge source to the measuring terminal. Previous studies partially validated the technique using computer simulation and practical experiments based on a PD calibrator to represent a discharge signal. 'Real' discharges produced by insulation defect models were used to study how discharges propagate in an 11 kV plain-disc-type transformer winding: A corona model and a 'floating objects in oil' model produced discharge signals with different durations at various locations along the winding. Measurements were taken at the tap of the bushing capacitance through a conventional discharge detector. The signals were filtered, amplified and fed into a digital storage oscilloscope. The frequency spectra of the measured signals showed significant similarities irrespective of the type of discharge source. The characteristic of the transfer functions, i.e. the crests and troughs in the spectra, could be used for locating the source of the discharge. Energising the transformer increased the level of electric noise, which did affect the low frequency end of the spectra, but did not have any impact on the characteristics used for location.
Details
- Title
- Investigation of propagation of partial discharges in power transformers and techniques for locating the discharge
- Authors/Creators
- S.N. Hettiwatte (Author/Creator) - University of ManchesterZ.D. Wang (Author/Creator) - University of ManchesterP.A. Crossley (Author/Creator) - School of Electrical & Electronic Engineering
- Publication Details
- IEE Proceedings - Science, Measurement and Technology, Vol.152(1), pp.25-30
- Publisher
- Institute of Electrical Engineers
- Identifiers
- 991005543825607891
- Copyright
- © IEE, 2005
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Citation topics
- 7 Engineering & Materials Science
- 7.251 Electrical - Harvesting & Discharging
- 7.251.1052 Partial Discharge
- Web Of Science research areas
- Engineering, Electrical & Electronic
- ESI research areas
- Engineering