NDLI: AC pollution flashover performance and flashover process of glass insulators at high altitude site

Content Provider	IET Digital Library
Author	Jiang, Xingliang Xiang, Ze Zhang, Zhijin Hu, Jianlin Hu, Qin Shu, Lichun
Abstract	The ac pollution flashover performance and flashover process of LXHY3-I6O insulators was investigated at a high altitude site (altitude of 1400m) in this paper. The solid layer method was used, and even-rising voltage method was adopted. According to the test results, the average pollution flashover voltage (U av) decreased with the increase of pollution, and there was no obvious relationship between the exponent characterising the influence of pollution and the length of the insulator strings. The relationship between U av and the length of the insulator strings was nearly linear. Subsequently, the effect of the pollution and the length of insulator strings on the critical flashover arc trajectory were analysed. It concluded that the critical flashover distance (l c) decreased with the increase of pollution, and it was shorter than the leakage distance (L 0), whereas there was no significant relationship between l c/L 0 and the length of insulator strings. The arc appearance at the high altitude site was very irregular with obvious bending and rocking; the local arcs deviated from the surface of the polluted insulators even more seriously and the diameter was thicker than those obtained in the normal environment. Moreover, the brightness and diameter of local arcs was related to pollution.
Starting Page	495
Ending Page	502
Page Count	8
ISSN	17518687
Volume Number	8
e-ISSN	17518695
Issue Number	Issue 3, Mar (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/8/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2013.0328
Journal	IET Generation, Transmission & Distribution
Publisher Date	2013-12-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Pollution Flashover Performance Air Gap Arc Artificial Pollution Tests Average Pollution Flashover Voltage Connector Critical Flashover Arc Trajectory Critical Flashover Distance Dielectric Breakdown And Discharges Flashover Glass Insulator High Altitude Site High-speed Camera Insulator Insulator Contamination Insulator String Length Insulator Testing Leakage Distance Local Arcs LXHY3-160 Insulator Pollution Flashover Process Power Line Supports Solid Layer Method Surface Arc
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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