Relation between the ac loss current method and the PEA method for water-treed length

Author

Ito, Noriyuki ; Ozaki, Tamon ; Sengoku, Is Sei ; Kawai, Jim ; Nakamura, Shuhei

Author_Institution

Dept. of Electron., Mie Univ., Tsu, Japan

fYear

2001

fDate

2001

Firstpage

524

Lastpage

527

Abstract

Change of ac loss current through a non-penetrated water-treed XLPE sheet sample with applied voltage has been studied based on a model. In the model, the conductance of the water-filled channel layer is assumed to exhibit a nonlinear dependence on voltage. The observed changes of the magnitude and phase of the fundamental current and the third harmonic component can be well fitted by the model. It is found that the length of the water-filled channel layer approaches that of the water-treed region estimated by the PEA method at 2 kV stress. It is also found that the length of the water-filled channel layer obtained by the ac loss current method has a good correlation with the length of the water-treed region estimated by the PEA method

Keywords

XLPE insulation; acoustoelectric devices; dielectric losses; electric admittance; power cable insulation; pulse measurement; trees (electrical); 2 kV; AC loss current method; PEA method; XLPE insulated power cable; XLPE sheet sample; fundamental current; model; nonlinear voltage dependence; third harmonic component; water-filled channel layer conductance; water-treed length; Cable insulation; Cable shielding; Current measurement; Dielectric measurements; Dielectrics and electrical insulation; Polyethylene; Power cables; Power measurement; Trees - insulation; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on

Conference_Location

Himeji

Print_ISBN

4-88686-053-2

Type

conf

DOI

10.1109/ISEIM.2001.973718

Filename

973718