RF-Based Partial Discharge Early Warning System for Air-Insulated Substations

Partial discharges (PDs) generate wideband radio-frequency interference which can be used for noninvasive monitoring of discharges. This paper presents a novel method based on this principle for PD monitoring of substations. The significant advantage of this method lies in the ability to detect PD s...

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Bibliographic Details
Published in:	IEEE transactions on power delivery 2009-01, Vol.24 (1), p.20-29
Main Authors:	Portugues, I.E., Moore, P.J., Glover, I.A., Johnstone, C., McKosky, R.H., Goff, M.B., van der Zel, L.
Format:	Article
Language:	eng
Subjects:	Activation Alarm systems Apparent charge Applied sciences condition monitoring Correlation Current transformers Discharge Early warning systems Electrical engineering. Electrical power engineering Electrical power engineering Exact sciences and technology Fault location impulsive noise location Monitoring partial discharge Partial discharges Power networks and lines Prototypes Radio frequency Radiofrequency interference radiometric monitoring Recording Substations Testing. Reliability. Quality control Transformers and inductors Voltage transformers Wideband
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Summary:	Partial discharges (PDs) generate wideband radio-frequency interference which can be used for noninvasive monitoring of discharges. This paper presents a novel method based on this principle for PD monitoring of substations. The significant advantage of this method lies in the ability to detect PD sources in energized equipment anywhere within a substation compound during normal operating conditions. The results obtained from the prototypes installed in the U.K. and U.S. substations are reported. Results include correlation with apparent charge and daily recordings obtained before, during, and after the failure of a 132-kV current transformer and 69-kV voltage transformer.
ISSN:	0885-8977 1937-4208