Analysis on Secondary Growth Characteristics of Electrical Trees in XLPE Cable

Author

Jia-bin, Liu ; Quan, Zhou ; Shijun, Chen ; Tao, Yang ; Ruijin, Liao ; Di, Ye

Author_Institution

State Key Lab. of Power Transm. Equip.&Syst. Security & New Technol., Chongqing Univ., Chongqing

fYear

2008

fDate

9-12 Nov. 2008

Firstpage

441

Lastpage

444

Abstract

In order to study the growth characteristics of electrical trees in XLPE cable under secondary pressuring, a short cable metal needle defect test device is adopted to study the growth characteristics of the new trees after the electrical trees in XLPE cable under the action of the voltage of 12 kV are influenced by secondary pressuring (15 kV). The research results show that influenced by secondary pressuring and voltage increase rate, there will be a peculiar ldquobush-branchrdquo electrical tree in XLPE cable insulation layer and the new trees under secondary pressuring have the characteristics of short initiation time, fast growth rate and narrow discharge channel, etc, which shows that secondary pressuring has a great effect on the secondary initiation and growth of electrical trees in XLPE cable and it is an important factor of accelerating cable aging and breakdown.

Keywords

XLPE insulation; insulation testing; life testing; power cable insulation; power cable testing; trees (electrical); underground cables; XLPE cable insulation layer; accelerating cable aging; bush-branch electrical tree initiation; electric breakdown; secondary growth characteristics; secondary pressuring; short-cable metal needle defect test device; underground cables; voltage 12 kV; voltage 15 kV; Cable insulation; Cable shielding; Copper; Needles; Partial discharges; Power transmission; Stress; Strips; Trees - insulation; Voltage; XLPE cables; discharge channel; electrical trees; growth characteristic;

fLanguage

English

Publisher

ieee

Conference_Titel

High Voltage Engineering and Application, 2008. ICHVE 2008. International Conference on

Conference_Location

Chongqing

Print_ISBN

978-1-4244-3823-5

Electronic_ISBN

978-1-4244-2810-6

Type

conf

DOI

10.1109/ICHVE.2008.4773968

Filename

4773968