Effects of Inclusions of Oxidized Particles in XLPE on Treeing Phenomena
Paper in proceedings, 2012

One issue with the use of crosslinked polyethylene (XLPE) insulation in high voltage power cables is the presence of oxidized particles. Oxidation may occur during production of polyethylene, during the extrusion and curing process used to produce XLPE cables, or in subsequent processes/operation of the cables. Oxidized particles are here referred to as organic contaminants. In the present study artificial organic contaminants were introduced in XLPE samples made for electrical treeing measurements. Instead of using the common needle-needle or needle-plane configuration, a wire-plane configuration was used. Organic contaminants have an increasing conductivity and permittivity as function of increasing degree of oxidation. These properties most probably give rise to local electric field enhancements in the material. The morphology of organic contaminants also differs from virgin XLPE, which probably cause bad adhesion between the XLPE matrix and the contaminants. A combination of these factors was found to affect the electrical performance of the insulation. Several different parameters, such as dry and wet ageing, as well as AC voltage and DC voltage stress, were included in the study.

Author

Espen Doedens

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Anette Johansson

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Markus Jarvid

Chalmers, Chemical and Biological Engineering, Polymer Technology

Susanne Nilsson

Nexans Norway AS

Karl Magnus Bengtsson

Nexans Norway AS

Jerker Kjellqvist

Dow Electrical and Telecommunications

2012 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2012, Montreal, 14-17 October 2012

0084-9162 (ISSN)

597-600

Subject Categories

Polymer Chemistry

Materials Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

Areas of Advance

Materials Science

DOI

10.1109/CEIDP.2012.6378851

More information

Created

10/6/2017