Title :
Positive streamer propagation and breakdown characteristics in non-uniform air gap
Author :
Iwata, Takeshi ; Okubo, Hitoshi ; Kojima, Hiroki ; Hayakawa, Naoki ; Endo, Fumihiro ; Yanagita, Norihito ; Kato, Tatsuro ; Rokunohe, Toshiaki
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagoya Univ., Nagoya, Japan
Abstract :
Discharge phenomena in a needle-plane electrode in air were studied with nano-second time resolution by means of synchronous measurement of streak image, light intensity, discharge current and fast-framing image. When positive impulse voltage was applied, a primary streamer initiated from the needle tip and propagated to the grounded plane electrode. A secondary streamer initiated after the primary streamer arrived at the plane electrode. There are close relations between the applied voltage, the primary and the secondary streamer current and the initiation time of the secondary streamer. The breakdown can start when the secondary streamer have arrived at the plane electrode. Moreover, the time to breakdown becomes shorter with the increase in the secondary streamer current.
Keywords :
air gaps; discharges (electric); electrodes; streak cameras; breakdown characteristic; discharge current; discharge phenomena; fast framing image; grounded plane electrode; light intensity; needle plane electrode; needle tip; nonuniform air gap; positive impulse voltage; positive streamer propagation; streak image; Current measurement; Discharges; Electrodes; Logic gates; Needles; Streaming media;
Conference_Titel :
High Voltage Engineering and Application (ICHVE), 2010 International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-8283-2
DOI :
10.1109/ICHVE.2010.5640749