Title :
A study of partial discharge characteristics in oil impregnated pressboard insulation
Author :
Mohsin, M.M. ; Narayanachar, M.N. ; Nema, R.S.
Author_Institution :
Aligarh Muslim Univ., India
Abstract :
An attempt has been made to study the effect of time and test procedure on the behaviour of partial discharge (PD) pulses causing failure of oil-pressboard system under power frequency voltages using circular disc shaped samples and uniform field electrodes. Weibull statistics have been used to handle the large amount of PD data. The PD phenomena has been found to be stress and time dependent. On the basis of stress level, three different regions are identified and in one of the regions, the rate of deterioration of the sample is at a maximum. The work presents some interesting features of Weibull parameters as related to the condition of insulation studied in addition to its usual PD characteristics
Keywords :
Weibull distribution; composite insulating materials; electric breakdown; insulation testing; paper; partial discharges; power transformer insulation; power transformer testing; transformer oil; Weibull parameters; Weibull statistics; circular disc shaped samples; insulation breakdown tests; oil impregnated pressboard insulation; partial discharge characteristics; power frequency voltages; power transformers; sample deterioration; stress level; uniform field electrodes; Electrodes; Frequency; Insulation; Occupational stress; Partial discharges; Petroleum; Pulse shaping methods; Statistics; System testing; Voltage;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549287
