Title :
Probabilistic assessment of flashover performance of transmission lines in contaminated areas
Author :
Suzuki, Y. ; Fukuta, T. ; Mizuno, Y. ; Naito, K.
Author_Institution :
NGK Insulators Ltd., Nagoya, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
Using a probabilistic method, a risk-of-failure study of 500 kV transmission line insulation was made by treating flashover voltage, contamination severity, degree of wetting as probabilistic variables. In the present study, a calculation of risk-of-failure was made using the actually recorded distribution of contamination severity, relative humidity and flashover voltage. The results were compared with those obtained by assuming normal distribution of the two variables
Keywords :
environmental degradation; failure analysis; flashover; high-voltage engineering; humidity; power cable insulation; power transmission lines; probability; surface contamination; wetting; 500 kV; contaminated areas; contamination severity distribution; flashover performance; flashover voltage; probabilistic assessment; probabilistic method; relative humidity; risk-of-failure study; salt deposits; transmission line insulation; transmission lines; wetting degree; Contamination; Dielectrics and electrical insulation; Flashover; Gaussian distribution; Humidity; Measurement standards; Pollution measurement; Probability density function; Transmission lines; Voltage;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
