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

Iliana E. Portugues, Philip J. Moore, Ian A. Glover, Carl Johnstone, Ralph H. McKosky, Mark B. Goff, Luke van der Zel

Research output: Contribution to journalArticlepeer-review

186 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)20-29
Number of pages10
JournalIEEE Transactions on Power Delivery
Issue number1
Early online date22 Dec 2008
Publication statusPublished - Jan 2009
Externally publishedYes


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