NDLI: Overvolted breakdown and recovery of gas spark gap

Content Provider	IEEE Xplore Digital Library
Author	Xinjing Cai Liming Wang Xiaobin Zou Xinxin Wang Weihua Jiang
Copyright Year	2010
Description	Author affiliation: Shenzhen Graduate School, Tsinghua University, Shenzhen 518055, China (Xinjing Cai; Liming Wang) \|\| State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China (Xiaobin Zou; Xinxin Wang; Weihua Jiang)
Abstract	The gaseous recovery in a spark gap was investigated by using Two-pulses method with which the tested spark gap was broken down twice by two identical voltage pulses with a preset time interval in between. While the first breakdown is overvolted breakdown, the second breakdown happens usually at a voltage much lower than the first one. By comparing the two breakdown voltages the gaseous recovery as a function of the time interval between the two voltage pulses was obtained. There are two plateaus on the curve of the breakdown voltage recovery. The first plateau appears at the voltage of about the DC static breakdown and the second one appears when the gas is almost fully recovered. It was found that the shorter gaps at all nitrogen pressure tend to recover faster and the gaps with higher pressure also tend to recover faster. If more energy is deposited in the spark channel produced by the first breakdown, the gas insulation recovers slower. Both the first breakdown voltage and the second one obey Gaussian distribution. If the second breakdown happens at the point before the end of the first plateau on the curve of the breakdown voltage recovery, its mean square deviation of the breakdown voltage distribution will be smaller than that of the first breakdown. By taking photographs of the discharge in the spark gap, it was important to find that the spark channel produced by the second breakdown usually does not follow that by the first breakdown. The second spark channel is located with a distance of 0 ∼ 3 mm from the first one. The longer is the time interval between the two voltage pulses, often the larger is the distance.
Starting Page	541
Ending Page	544
File Size	974932
Page Count	4
File Format	PDF
ISBN	9781424471317
ISSN	1930885X
e-ISBN	9781424471324
DOI	10.1109/IPMHVC.2010.5958414
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Breakdown voltage two-pulses method Gaussian distribution Plasmas Sparks Nitrogen overvolted breakdown two plateau
Content Type	Text
Resource Type	Article

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