Study on the influence of rain flush to insulator surface pollution layer conductivity and dynamic contamination accumulated

2015 ◽  
pp. 265-270
Keyword(s):  
Insulator Surface

Numerical Simulation of Leakage Current on Conductive Insulator Surface

2019 ◽  
Vol 8 (4) ◽  
pp. 9487-9492
Keyword(s):  
Numerical Simulation ◽  
Electric Field ◽  
Leakage Current ◽  
Method Of Lines ◽  
Electron Attachment ◽  
Negative Ions ◽  
Conduction Current ◽  
Insulator Surface ◽  
Finite Difference Approximations ◽  
Positive Ions

The outdoor insulator is commonly exposed to environmental pollution. The presence of water like raindrops and dew on the contaminant surface can lead to surface degradation due to leakage current. However, the physical process of this phenomenon is not well understood. Hence, in this study we develop a mathematical model of leakage current on the outdoor insulator surface using the Nernst Planck theory which accounts for the charge transport between the electrodes (negative and positive electrode) and charge generation mechanism. Meanwhile the electric field obeys Poisson’s equation. Method of Lines technique is used to solve the model numerically in which it converts the PDE into a system of ODEs by Finite Difference Approximations. The numerical simulation compares reasonably well with the experimental conduction current. The findings from the simulation shows that the conduction current is affected by the electric field distribution and charge concentration. The rise of the conduction current is due to the distribution of positive ion while the dominancy of electron attachment with neutral molecule and recombination with positive ions has caused a significant reduction of electron and increment of negative ions.

Charge distribution on polymer insulator surface under AC voltage

2019 ◽  
Vol 26 (5) ◽  
pp. 1709-1715 ◽  
Author(s):  
Dayu Li ◽  
Guixin Zhang ◽  
Yicen Hou ◽  
Boya Zhang
Keyword(s):  
Charge Distribution ◽  
Insulator Surface ◽  
Polymer Insulator

Online Measurement of Pulsed Electric Field of Insulator Surface in Vacuum Based on Kerr Effect

2014 ◽  
Vol 42 (10) ◽  
pp. 2986-2990 ◽  
Author(s):  
Weili Liu ◽  
Yangyang Fu ◽  
Xiaobing Zou ◽  
Peng Wang ◽  
Xinxin Wang
Keyword(s):  
Electric Field ◽  
Kerr Effect ◽  
Pulsed Electric Field ◽  
Online Measurement ◽  
Insulator Surface

Temporal Changes in Source–Drain Current for Organic Field-Effect Transistors Caused by Dipole on Insulator Surface

2008 ◽  
Vol 1 ◽  
pp. 061801 ◽  
Author(s):  
Kouji Suemori ◽  
Misuzu Taniguchi ◽  
Sei Uemura ◽  
Manabu Yoshida ◽  
Satoshi Hoshino ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Drain Current ◽  
Temporal Changes ◽  
Organic Field Effect Transistors ◽  
Insulator Surface
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