Characteristic features of electrical treeing in XLPE and PE

Author

Yang, J.J. ; Brilasekaran, S.

Author_Institution

Sch. of EEE, Nanyang Technol. Univ.

fYear

2005

fDate

Nov. 29 2005-Dec. 2 2005

Firstpage

1

Lastpage

34

Abstract

In this preliminary study, electrical tree formation in 220 kV XLPE insulation sample and transparent PE sample was diagnosed by PD measurements and physical observation. Increased electrical stress due to cable joints was simulated by point-plane electrode configuration. Various analyses for PD pulses distribution in 20 ms and single pulses were carried out in three experiments to compare the effects of applied voltage, rate of rise of applied voltage, and period of constant voltage stress. Two types of electrical trees have been found out based on PD analysis and optical recording. Observed light emission supported the theory of emission by protons due to high-energy electrons. The analysis was supported with dielectrometry measurements on the sample before and after tree formation

Keywords

XLPE insulation; partial discharge measurement; power cable insulation; trees (electrical); 20 ms; 220 kV; PD measurements; PD pulses distribution; XLPE insulation; cable joints; constant voltage stress; dielectrometry measurements; electrical stress; electrical treeing; high-energy electrons; light emission; optical recording; point-plane electrode; transparent PE sample; Dielectrics and electrical insulation; Electric variables measurement; Electrodes; Optical pulses; Optical recording; Power cable insulation; Power cables; Stress; Trees - insulation; Voltage; PE; Treeing; XLPE;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference, 2005. IPEC 2005. The 7th International

Conference_Location

Singapore

Print_ISBN

981-05-5702-7

Type

conf

DOI

10.1109/IPEC.2005.206874

Filename

1627163