Impacts of temperature on the distribution of electric-field in HVDC cable joint

Author

Yanjun Qin;Nanqiang Shang;Minghe Chi;Xinyu Wang

Author_Institution

MOE Key Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology, China

fYear

2015

fDate

7/1/2015 12:00:00 AM

Firstpage

224

Lastpage

227

Abstract

Impacts of temperature on the distribution of electric field in high voltage direct current (HVDC) cable joint have been investigated with COMSOL Multi-physics. The simulation of electric field under combined thermal-electrical conditions was carried out on a three-dimensional joint model, in which constant dc voltage and combined dc/impulse voltage were applied on the cable core while the temperatures of conductor were 298K, 333K and 363K respectively. The results show that the maximal field in the model and the tangential field on XLPE/SR interface increase a lot with the temperature increasing under dc voltage, and the position of maximal field changes from the head of high-voltage screen to the head of stress cone. When applied with combined dc/impulse voltage, the maximal field distribution appears at three different points in cable joints.

Keywords

"Power cables","Joints","Electric fields","Power cable insulation","Temperature distribution","Conductivity"

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials (ICPADM), 2015 IEEE 11th International Conference on the

Electronic_ISBN

2160-9241

Type

conf

DOI

10.1109/ICPADM.2015.7295249

Filename

7295249