NDLI: Relevance of phase resolved PD analysis to insulation diagnosis in industrial equipment

Content Provider	IEEE Xplore Digital Library
Author	Stone, G.C.
Copyright Year	2010
Description	Author affiliation: Iris Power, 3110 Mississauga, ON, L4V 1B2 Canada (Stone, G.C.)
Abstract	The display of digitized PD pulses with respect to the power frequency AC cycle has been widely applied both in the laboratory measurement of PD, as well as within industrial PD measurement systems on equipment such as cables, transformers and rotating machines. Theory shows that PD will occur with a specific polarity and phase position. Furthermore, depending on the location of the PD with respect to the electrodes, the pattern will change. This well-proven phenomena obtained from experiments with single voids and defects has been applied to the industrial measurements of PD using a number of commercial PD detectors on HV apparatus, with the intention of identifying the root cause of any PD. PD data from many stator windings indicates that these basic principles are often valid. However, results from thousands of on-line PD measurements indicate that PD patterns will not always correctly predict the nature of the PD sources, as determined by visual examination of the insulation. Thus diagnosis based on pulse phase analysis in stator winding insulation systems should be done with some skepticism. We speculate that, unlike PD in most other apparatus, there tends to be hundreds of PD sites in stator windings, which may obscure the theoretical patterns.
Starting Page	1
Ending Page	5
File Size	315220
Page Count	5
File Format	PDF
ISBN	9781424479450
e-ISBN	9781424479443
e-ISBN	9781424479436
DOI	10.1109/ICSD.2010.5567971
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-04
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Insulation Stator windings Discharges Visualization Generators Pollution measurement
Content Type	Text
Resource Type	Article

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