NDLI: Correlations between electrical and acoustic detection of partial discharge in liquids and implications for continuous data recording

Content Provider	IEEE Xplore Digital Library
Author	von Glahn, P. Stricklett, M.L. Van Brunt, R.J. Cheim, L.A.V.
Copyright Year	1996
Description	Author affiliation: Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA (von Glahn, P.)
Abstract	Simultaneous measurements were made of electrical and acoustic signals from partial discharges (PD) produced by applying an alternating voltage at a frequency of 70 Hz to a point-plane electrode gap immersed in transformer oil. Both internally and externally mounted acoustic sensors were tested, and in all cases the intensity of the acoustic PD signal was found, on average, to increase with the amplitude of the electrical PD signal. The correlation between acoustic and electrical PD signals was found to be consistent with results reported from previous investigations. It is shown here that, because of this strong correlation, it is possible to extract statistical information from continuously recorded acoustic PD data, such as pulse phase (time) and amplitude distributions that are in agreement with those obtained from the electrical data. It is demonstrated that by having continuous records of all PD events that occur during a test, it is possible to uncover new statistical information that is useful in attempts to understand the physical basis for the phenomenon.
Starting Page	69
Ending Page	74
File Size	563439
Page Count	6
File Format	PDF
ISBN	0780335317
ISSN	1089084X
DOI	10.1109/ELINSL.1996.549285
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-16
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic signal detection Partial discharges Acoustic testing Acoustic pulses Acoustic measurements Frequency measurement Electric variables measurement Electrodes Oil insulation Acoustic sensors
Content Type	Text
Resource Type	Article

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