DocumentCode :
3498370
Title :
The correlation of PD-charge and -energy patterns in the study of partial discharge mechanism in thermosetting insulation
Author :
Florkowska, B. ; Zydron, P.
Author_Institution :
Inst. of Electr. Power, Univ. of Min. & Metall., Cracow, Poland
Volume :
5
fYear :
1999
fDate :
1999
Firstpage :
268
Abstract :
The objective of this paper is the interpretation of distributions and phase-resolved patterns of partial discharges apparent charge and energy. Results of the measurements performed have been obtained in long-term tests at increased electrical and thermal stresses. This issue is of vital cognitive importance for the assessment of material degradation mechanisms; it is also very important while diagnosing the high voltage insulating systems. Test and measurements were carried out using a thermosetting insulation system in high voltage machines in which PD occurred at an increased temperature and increased working intensity of the electrical field was applied in investigations has been used as the object of tests and measurements. After these tests the decrease of the PD pulses magnitude and the increase of the number of small pulses were observed in the PD charge distributions. This means the transition of partial discharges to a high repetition form-multiply tiny discharges. In this case, it is also observed in the PD pulses energy distribution, the presence of the extremum in the range of small values of energy. This effect provides new information about the degradation process
Keywords :
insulation testing; PD pulses energy distribution; PD-charge patterns; PD-energy patterns; degradation process; electrical field; electrical stresses; high-voltage insulating systems; high-voltage machine insulation; material degradation mechanisms; partial discharge mechanism; thermal stresses; thermosetting insulation; working intensity;
fLanguage :
English
Publisher :
iet
Conference_Titel :
High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)
Conference_Location :
London
ISSN :
0537-9989
Print_ISBN :
0-85296-719-5
Type :
conf
DOI :
10.1049/cp:19990937
Filename :
818289
Link To Document :
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