Method of equal probability overvoltages for calculating risk of failure of power transmission lines

Author

Gavric, M.R.

Author_Institution

Elektrotech. Inst. Nikola Tesla, Beograd, Yugoslavia

Volume

138

Issue

1

fYear

1991

fDate

1/1/1991 12:00:00 AM

Firstpage

19

Lastpage

26

Abstract

The author presents a generalised numerical method for calculating the risk of failure of power transmission lines due to switching overvoltages. The method incorporates the influence of overvoltage profile and differences in breakdown properties of insulation along the line on the risk of failure, irrespective of their probability distribution laws. The risk is calculated for several overvoltage probability distribution laws and line insulation levels. The influence of the overvoltage distribution along the line, i.e. overvoltage profile, on the risk of failure is considered for overvoltages obtained by calculations, as well as for overvoltages obtained by measurements on a specific transmission line. If the breakdown properties of insulation are given as a function of the wave front duration, it is possible by this method to incorporate into the calculations the influence of the wave front duration along the line on the risk of failure

Keywords

failure analysis; overvoltage; power transmission lines; probability; insulation breakdown properties; line insulation levels; overvoltage profile; power transmission lines; switching overvoltages; wave front duration;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings C

Publisher

iet

ISSN

0143-7046

Type

jour

Filename

61650