DocumentCode :
1199134
Title :
Particle-triggered pre-breakdown phenomena in atmospheric air gap under AC voltage
Author :
Hara, Masanori ; Negara, Yulistya ; Setoguchi, Makoto ; Kurihara, Takashi ; Suehiro, Junya ; Haashi, N.
Author_Institution :
Graduate Sch. of Inf. Sci. & Electr. Eng., Kyushu Univ., Fukuoka, Japan
Volume :
12
Issue :
5
fYear :
2005
Firstpage :
1071
Lastpage :
1081
Abstract :
Corona discharge mechanism and breakdown voltage characteristics of air gaps in the presence of metallic particles were investigated including the relationship between the corona discharge mechanism and the phase resolved partial discharge patterns. These results are of interest for detection of foreign particles in gas insulated systems (GIS). The results with different shaped particles show that the corona mechanism depends on the particle shape and applied voltage. Moreover the corona discharges on both sides of the particle interfere with each other by inflow of charge carriers into the particle. The breakdown voltage is a minimum when the particle is in the vicinity of the electrode due to active interference of coronas. The phase-charge characteristics as the phase resolved partial discharge patterns vary with the particle shape. This suggests that the corona discharge mechanisms for all types of particles should be considered in the particle-detection method for GIS based on the phase resolved partial discharge patterns.
Keywords :
air insulation; corona; partial discharges; power apparatus; AC voltage; GIS; atmospheric air gap; breakdown voltage characteristic; corona discharge mechanism; corona interference; gas insulated system; metallic particle; partial discharge pattern; particle-triggered pre-breakdown phenomena; phase-charge characteristic; Air gaps; Breakdown voltage; Charge carriers; Corona; Electrodes; Gas insulation; Geographic Information Systems; Interference; Partial discharges; Shape;
fLanguage :
English
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
1070-9878
Type :
jour
DOI :
10.1109/TDEI.2005.1522199
Filename :
1522199
Link To Document :
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