Analysis of transient electric field for epoxy spacer under lightning impulse voltage

2006 ◽  
Vol 42 (4) ◽  
pp. 595-598 ◽  
Author(s):  
Youhua Gao ◽  
Erzhi Wang ◽  
Y. Li ◽  
Hui Li
Keyword(s):  
Electric Field ◽  
Impulse Voltage ◽  
Lightning Impulse ◽  
Transient Electric Field

scholarly journals Ignition and advancement of surface discharges at atmospheric air under positive lightning impulse voltage depending on perpendicular electric stress and solid dielectrics: modelling of the propagating phenomenology

2018 ◽  
Vol 82 (2) ◽  
pp. 20801 ◽  
Author(s):  
Mohammed Adnane Douar ◽  
Abderrahmane Beroual ◽  
Xavier Souche
Keyword(s):  
Electric Field ◽  
Electrostatic Field ◽  
Physical Mechanisms ◽  
Space Charges ◽  
Electric Stress ◽  
Impulse Voltage ◽  
Lightning Impulse ◽  
Surface Discharges ◽  
Solid Dielectrics ◽  
The Relationship

In many high voltage equipment, partial discharges are regarded as one of the most widespread pathology whose ignition conditions and effects are studied by scientists and manufacturers to avoid major failures. Actually, those electrical gaseous phenomena generally occur under several constraints such as the electrostatic field level, the nature of insulating surface being polluted or not, and switching or lightning transients. The present paper discusses physical mechanisms related to the creeping discharges propagation growing over insulators subjected to perpendicular electric field and positive lightning impulse voltage. More precisely, the developed discussion attempts to answer some observations especially noticed for main discharges feature namely (i) the discharges morphology, (ii) their velocity and (iii) the space charges effects on electric field computation. Several factors like (i) the influence of the type of a material’s interface, its electric conductivity, permittivity and discharges mobility, (ii) the relationship between the applied electrostatic field, the space charges, the velocity, the propelling pressure and discharges temperature are among numerous parameters that have been addressed in this study which discusses lightning impulse transients phenomena.

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