Local surface field- and charge distributions and their impact on breakdown voltage for HVDC cable insulation
Paper in proceedings, 2019

Abstract. The surface topography on material interfaces plays a crucial role in performance of HVDC cable systems. In this work, the texture of interfaces was analyzed and its impact on electric field distributions at the surface was simulated. It was found that the effect of roughness and field dependent bulk conductivity of the insulation on the field distribution is associated with significant local quantities of space charges accumulated at the surface. It is shown that charge accumulation and corresponding local electric field enhancements are the parameters defining local conduction, injection and material degradation at insulation interfaces. A correlation between simulated/calculated field distributions and ramped DC breakdown voltages on cable peelings was observed.

XLPE

space charge

cable peelings

surface topography

cable accessories

DC breakdown voltage.

electric field distribution

surface preparation

roughness

HVDC

Author

Espen Doedens

Chalmers, Electrical Engineering, Electric Power Engineering, Power grids and Components

Markus Jarvid

Nexans Norway AS

Yuriy Serdyuk

Chalmers, Electrical Engineering, Electric Power Engineering, Power grids and Components

Raphaël GUFFOND

Dimitri CHARRIER

International Conference on Insulated Power Cables Jicable'19

F2-24

Jicable'19 - 10th International Conference on Insulated Power Cables
Paris, Versailles, France,

Areas of Advance

Energy

Subject Categories

Other Materials Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

More information

Latest update

1/13/2020