Title :
Breakdown characteristics in air gaps with artificial floating metals under DC voltage
Author :
Kubuki, Mamoru ; Yoshimoto, Ryuichi ; Tanoue, Kazuki ; Hara, Masanori
Author_Institution :
Dept. of Electr. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
2/1/1995 12:00:00 AM
Abstract :
The DC breakdown characteristics of a sphere-to-sphere gap with conducting objects supported by an insulator rod in atmospheric air are investigated experimentally to provide fundamental parameters determining the breakdown voltage in the presence of floating objects around DC power apparatus by an air insulation. The shape of tested floating objects made of metal is plate, needle or sphere. Experimental results show that the main factors affecting the breakdown voltage are the shape and size of floating objects, the object location and the gap length. If the object is placed at the location giving the lowest breakdown voltage, any object lowers the breakdown voltage below that without the relevant objects
Keywords :
HVDC power transmission; air gaps; corona; insulator testing; DC breakdown characteristics; DC power apparatus; air gaps; artificial floating metals; atmospheric air; conducting objects; corona; gap length; insulator rod; needle; object location; plate; sphere; sphere-to-sphere gap; Air gaps; Breakdown voltage; Corona; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Metal-insulator structures; Needles; Shape; Testing;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
