scholarly journals Influences of water droplet size and pollution layer permittivity on the electric field and potential distribution on a polluted insulator surface

2008 ◽  
Vol 6 (6) ◽  
pp. 1-12
Author(s):  
M. Kamel ◽  
M. AbouelSaad ◽  
Amged El-Wakeel ◽  
H. Hassan
Keyword(s):  
Electric Field ◽  
Droplet Size ◽  
Water Droplet ◽  
Potential Distribution ◽  
Insulator Surface

The Potential Distribution of Icing Insulators

2011 ◽  
Vol 71-78 ◽  
pp. 2526-2529
Author(s):  
Yong Qiang Wang ◽  
Xiao Fei Liu ◽  
Yong Chao Zhu
Keyword(s):  
Finite Element ◽  
Electric Field ◽  
Power System ◽  
Surface Potential ◽  
Potential Distribution ◽  
Static Electric Field ◽  
Insulator Surface ◽  
Model Based ◽  
Ceramic Insulator

The phenomenon of icing on insulators was common in power system, therefore, the research on insulator potential of different icing length is meaningful for clearing the ice on insulators. 110kV non-ceramic insulator (FXBW-110/120) was taken as an example, the model based on finite element static electric field is built in ANSYS to analyze the effect on potential distribution of insulator surface based on different icing length. The result shows that: the potential of clean non-ceramic insulator is not well distributed, surface potential of insulator is not affected greatly when icing length is below 60cms; The end potential of insulator is greatly changed when the icing length is up to 70cms; The whole surface potential of insulator is changed and insulation capability is droped obviously when the icing length is up to 80cms.

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.

Detection of Water Droplet Size and Anion Species by Nonlinear Optical Scattering

1987 ◽  
Vol 4 (1-4) ◽  
pp. 85-89 ◽  
Author(s):  
Johannes H. Eickmans ◽  
Shi-Xiong Qian ◽  
Richard K. Chang
Keyword(s):  
Droplet Size ◽  
Water Droplet ◽  
Nonlinear Optical ◽  
Optical Scattering ◽  
Anion Species

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
Sign in / Sign up

Export Citation Format

Share Document