DocumentCode :
26931
Title :
Influence of pollution distribution on insulator surface on flashover characteristics
Author :
Sun, Jian ; Gao, G. ; Wu, Guangfu ; Cao, Xin ; Zhu, Guangxu
Author_Institution :
Southwest Jiaotong University School of Electrical Engineering Chengdu 610031, China
Volume :
21
Issue :
4
fYear :
2014
fDate :
Aug-14
Firstpage :
1637
Lastpage :
1646
Abstract :
High-speed airflow, which is generated around trains running at a high speed, causes uneven pollutant distribution on insulator surfaces and changes their insulation properties. In this paper, a method has been proposed to calculate the residual pollutant resistance on polluted insulator. Based on the analysis of flashover model, the influence of pollution distribution along and around insulator was discussed. Analysis result showed that flashover voltage would increase when the pollutant distribution on insulator decreased compared to conditions with uniformly distributed pollutant, and vice versa. It implied that there should be a maximum pollutant accumulation value above and below the insulator shed. In this situation, the flashover voltage will be the lowest. Model analysis showed that the flashover voltage would increase with the length of the insulated plate and vice versa. The theoretical analysis was in good agreement with experimental result, which implied that this method might be able to provide reference for insulator shed design.
Keywords :
Equations; Flashover; Insulators; Mathematical model; Pollution; Resistance; Surface contamination; Flashover; arc length; insulator; leakagecurrent.; model; pollution; resistance;
fLanguage :
English
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
1070-9878
Type :
jour
DOI :
10.1109/TDEI.2014.004303
Filename :
6877991
Link To Document :
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