Title :
Surface charge accumulation on cylindrical polymeric model insulators in air: simulation and measurement
Author :
Lutz, B. ; Kindersberger, J.
Author_Institution :
Lehrstuhl fur Hochspannungs- und Anlagentechnik, Tech. Univ. Munchen, Munich, Germany
fDate :
12/1/2011 12:00:00 AM
Abstract :
The time characteristics of the surface charge accumulation process on cylindrical polymeric model insulators under dc stress were investigated in a partial discharge free, dry air environment. In order to simulate the influence of different dielectric and electric material properties on surface charge accumulation, a tool was developed which considers also the nonlinear behavior of the electric conduction mechanism within the gas volume. The results of simulation have been verified by measurements of the surface potential distribution along the samples at different ambient temperatures.
Keywords :
partial discharges; polymer insulators; surface potential; DC stress; ambient temperatures; cylindrical polymeric model insulators; dielectric material property; electric conduction mechanism; electric material property; gas volume; nonlinear behavior; partial discharge free dry air environment; surface charge accumulation process; surface potential distribution; time characteristics; Conductivity; Current density; Electric fields; Electric potential; Insulators; Mathematical model; Surface treatment; HVDC systems; polymeric insulators; surface charge accumulation;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2011.6118642
