Surface Potential Decay on Material Samples Taken From In-service Aged (U) HVDC Silicone Rubber Composite Insulators
Journal article, 2017
Surface potential decay characteristics of specimens extracted from in-service aged and reference UHVDC composite insulator sheds are reported and analyzed in this paper. In the experiments, surfaces of the insulator samples were charged by dc corona and the decay was recorded utilizing a non-contact technique. In addition, surface and bulk conductivities of the specimens were determined and used for analyzing by means of computer simulations their impact on the potential distribution profiles and its decay. Based on the performed experiments, trap density distributions, mobility of charge carriers and field dependent bulk conductivities are deduced for the investigated samples with the aim to evaluate the ageing severity.
electrical conductivity.
surface charging
ageing
potential decay
charge transport
surface potential
HVDC composite insulator
Author
yuan chao
South China University of Technology
congzhen xie
South China University of Technology
licheng li
South China University of Technology
Xiangdong Xu
Chalmers, Materials and Manufacturing Technology, High Voltage Engineering
Stanislaw Gubanski
Chalmers, Materials and Manufacturing Technology, High Voltage Engineering
IEEE Transactions on Dielectrics and Electrical Insulation
1070-9878 (ISSN) 15584135 (eISSN)
Vol. 24 1 592-600Areas of Advance
Energy
Materials Science
Subject Categories (SSIF 2011)
Electrical Engineering, Electronic Engineering, Information Engineering
Composite Science and Engineering
DOI
10.1109/TDEI.2016.006007