The effect of water treeing on the electric field distribution of XLPE. Consequences for the dielectric strength
Citations Over TimeTop 20% of 2000 papers
Abstract
This paper describes the influence of water trees on dielectric properties of flat samples cut from a HV crosslinked polyethylene (XLPE) cable insulation. In order to obtain experimental results in a short period of time, we used accelerated aging conditions of voltage and frequency as well as different techniques for producing a multitude of artificial water tree inception points. The average value of the water tree permittivity and a law for the time-dependence of permittivity inside the treed degraded areas were deduced from measurements of capacitance and water tree lengths. On the basis of the experimental knowledge of permittivity and water tree length, we determined with analytical numerical methods, the distribution of the electric field for different shapes of treed regions. Because of the increase in length and permittivity of the water tree, the electric field in front of the degraded area is amplified, which is an important factor of risk leading to the electric breakdown.
Related Papers
- → A simple method for measuring the relative permittivity of printed circuit board materials(2001)59 cited
- → Effects of high-dose gamma ray irradiation on the physicochemical properties and water-treeing deterioration of cross-linked polyethylene cable insulation(2011)9 cited
- → Effect Of Applied Voltage Frequency On Electrical Treeing In 22 Kv Cross-Linked Polyethylene Insulated Cable(2011)2 cited
- → Estimation of the Wall Thickness and Relative Permittivity by Radar System(2018)2 cited
- FREQUENCY DEPENDENCE ON WATER TREE DEGRADATION IN XLPEMEDIUM VOLTAGE POWER CABLE(2014)