DocumentCode :
2046772
Title :
A novel technique for the identification of defects in stator bar insulation systems by partial discharge measurements
Author :
Contin, A. ; Cavallini, A. ; Montanari, G.C. ; Puletli, F.
Author_Institution :
Dipt. di Elettrotecnica, Elettronica ed Inf., Trieste Univ., Italy
fYear :
2000
fDate :
2000
Firstpage :
501
Lastpage :
505
Abstract :
Results of investigations performed in order to improve the current diagnostic techniques used for the evaluation of insulation systems of AC rotating machine stator windings are presented. Improvements come from the development of a new measuring system and the stochastic analysis of partial discharge (PD) pulse signals. The measuring system allows the digital acquisition of PD-pulse signals, operates at a sampling rate high enough to avoid frequency aliasing and provides an amount of PD-pulses which enables PD stochastic analysis. In addition to the traditional PD-pulse height and phase analysis, PD-pulse shape processing is also available. The first results of PD measurements performed on different types of complete stator bars, with and without defects, are reported to show the system performance
Keywords :
AC machines; Weibull distribution; insulation testing; machine insulation; maximum likelihood estimation; partial discharge measurement; signal sampling; stators; turbogenerators; waveform analysis; AC rotating machine; PD pulse signals; Weibull function; defects identification; digital acquisition; height analysis; high sampling rate; maximum likelihood estimation; partial discharge measurements; phase analysis; pulse shape processing; stator bar insulation systems; stochastic analysis; turbogenerator; waveform analyser; Frequency measurement; Insulation; Partial discharge measurement; Partial discharges; Performance evaluation; Pulse measurements; Rotating machines; Signal analysis; Stator windings; Stochastic systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation, 2000. Conference Record of the 2000 IEEE International Symposium on
Conference_Location :
Anaheim, CA
ISSN :
1089-084X
Print_ISBN :
0-7803-5931-3
Type :
conf
DOI :
10.1109/ELINSL.2000.845558
Filename :
845558
Link To Document :
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