Electrical Degradation of High Voltage Cable Insulation Energized by Switching Impulses

Author

Grzybowski, S. ; Shrestha, P. ; Cao, L.

Author_Institution

Dept. of Electr. & Comput. Eng., Mississippi State Univ., Starkville, MS

fYear

2008

fDate

26-29 Oct. 2008

Firstpage

25

Lastpage

28

Abstract

The electrical degradation of cable insulation in distribution lines is due to the electrical stress caused by switching surges. During the operation, the insulation of power cables will be placed under high electrical stress, including overvoltages caused by switching. The status of power cable insulation aging is evaluated by the measurement of partial discharge level and AC breakdown voltage. The study helps to determine the reliability of power cables, as well as an estimation of the cable´s expected lifetime. Many other factors than aging by switching surges have to be also considered as effect of the electrical insulation degradation.

Keywords

ageing; electric breakdown; insulation testing; partial discharge measurement; power cable insulation; power distribution lines; surges; voltage measurement; AC breakdown voltage measurement; distribution lines; electrical insulation degradation; electrical stress; high voltage cable insulation aging; partial discharge measurement; switching surges; Aging; Cable insulation; Degradation; Dielectrics and electrical insulation; Partial discharge measurement; Power cable insulation; Power cables; Stress; Surges; Voltage; AC breakdown; Degradation; cable insulation; partial discharges; switching impulse;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2008. CEIDP 2008. Annual Report Conference on

Conference_Location

Quebec, QC

Print_ISBN

978-1-4244-2548-8

Electronic_ISBN

978-1-4244-2549-5

Type

conf

DOI

10.1109/CEIDP.2008.4772849

Filename

4772849