NDLI: Effect of atmospheric pressure on discharge performance of short air-gaps at altitude of 4000 m and above

Content Provider	IEEE Xplore Digital Library
Author	Lichun Shu Zhiliang Zhao Xingliang Jiang Zhijun Tian Jijian Wang
Copyright Year	2003
Description	Author affiliation: Electr. New Technol. of Minist. Educ., Chongqing Univ., China (Lichun Shu; Zhiliang Zhao; Xingliang Jiang)
Abstract	In order to supply a referred test data for the external insulation design of the Qinghai-Tibet electrization railway's 27.5 kV power supply system, simulated the atmospheric conditions of the altitude of 4000 m and above in the artificial climate chamber, the AC and the positive lightning impulse discharge performance of rod-plane short air-gaps of less than 500 mm was carried out. According to the test results, this paper analyzes the factors influenced the discharge voltage of a short air-gap at the pressure of the altitude of 4000 m and above. And it puts forward that both the AC and the 50% positive lightning discharge voltage of a rod-plane short air-gap is a power function of the pressure, and that the characteristic index of the effect of pressure on the discharge voltage is related to the type of the voltage and the distance of the air-gap. Then it puts forward that both the AC and the positive lightning impulse discharge voltage of the short air-gap decrease 5/spl sim/6% with a rise of 1-kilometer at the altitude of 4000 m and above.
Sponsorship	IEEE Dielectrics & Electrical Insulation Soc. IEE Japan
Starting Page	125
Ending Page	128
File Size	281201
Page Count	4
File Format	PDF
ISBN	0780377257
ISSN	10817735
DOI	10.1109/ICPADM.2003.1218369
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-01
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Air gaps Voltage Rail transportation Lightning Laboratories Dielectrics and electrical insulation Power supplies Testing Humidity Temperature
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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