Electrical breakdown properties of low density polyethylene under DC voltage

Author

Jing Zhang ; Jian Li ; Yan Wang ; Lianwei Bao ; Xiaomeng Zhang

Author_Institution

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

fYear

2014

fDate

8-11 Sept. 2014

Firstpage

1

Lastpage

4

Abstract

The development of high voltage DC power cable is far lagging behind that of AC power cable partly due to the breakdown properties of DC cable insulation under the influence of multiple factors such as space charge and temperature. This paper presents an experimental research on electrical breakdown properties of LDPE at various temperatures to investigate the properties of DC cable insulation. A thermal aging chamber was designed for the breakdown experiment of LDPE at different levels of temperature. The breakdown experiments of LDPE were carried out and thus the influence of temperature and voltage type on the breakdown properties of LDPE was obtained. The results show that temperature has significant influence on the breakdown field strength of LDPE under DC voltage. The dispersion of breakdown field strength becomes bigger with the increase of temperature. In contrast, the influence of temperature on breakdown strength of LDPE insulation under AC voltage is relatively small.

Keywords

ageing; electric breakdown; polyethylene insulation; power cable insulation; space charge; AC power cable; DC cable insulation; DC voltage; LDPE; breakdown field strength; electrical breakdown properties; high voltage DC power cable; low density polyethylene; space charge; thermal aging chamber; Breakdown voltage; Dispersion; Electric breakdown; Space charge; Temperature; Voltage measurement; Weibull distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

High Voltage Engineering and Application (ICHVE), 2014 International Conference on

Conference_Location

Poznan

Type

conf

DOI

10.1109/ICHVE.2014.7035400

Filename

7035400