Study on DC component caused by water treeing in XLPE cable

Author

Zhang, Chunxi ; Sheng, Shouguo ; Yang, JiaXiang ; Chi, Xiaochun

Author_Institution

Harbin Univ. of Sci. & Technol., China

fYear

2002

fDate

2002

Firstpage

926

Lastpage

929

Abstract

In this paper, based on the possible mechanism of DC component production, a set for measurement of the DC component in a piece of aging XLPE cable insulation has been designed in the laboratory. The AC component of the current in the insulation is much larger than the DC component, and the main problem is therefore to filter the AC component or to strengthen the DC component in order to obtain a sensitive DC component measuring system. During experiment, a bypass capacitor is used to filter the AC component and an additional direct voltage source is used to strengthen the DC component. The results of experiment indicate that the DC component is correlated with the ageing degree of XLPE insulation. They also show that the value of the DC component varies with the amount of high AC voltage applied. The experimental results are helpful to realize a hot line diagnosis system about water treeing in XLPE insulation cable.

Keywords

XLPE insulation; ageing; electric current measurement; insulation testing; polymers; power cable insulation; trees (electrical); AC component filtering; DC component; DC component strengthening; XLPE cable insulation; additional direct voltage source; aging; bypass capacitor; hot line diagnosis system; water treeing; Aging; Cable insulation; Dielectric loss measurement; Dielectric measurements; Dielectrics and electrical insulation; Electrodes; Loss measurement; Power cables; Trees - insulation; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2002 Annual Report Conference on

Print_ISBN

0-7803-7502-5

Type

conf

DOI

10.1109/CEIDP.2002.1048948

Filename

1048948