DocumentCode :
2659435
Title :
The influence of surface ageing features of insulators on wet flashover performance
Author :
Tzimas, A. ; Rowland, S.M. ; Barrett, J.
Author_Institution :
Sch. of Electron. & Electr. Eng., Univ. of Manchester, Manchester, UK
fYear :
2010
fDate :
17-20 Oct. 2010
Firstpage :
1
Lastpage :
4
Abstract :
This paper presents an investigation into how aged surfaces can reduce the wet flashover performance of composite insulators under extreme weather conditions. Surface ageing features of composite insulators returned from service reveal a non-uniform distribution of roughness that creates interfaces between smooth and rough surface areas. The resulting surfaces have radically different hydrophobicities. This interface can, under “suitable” wet and windy weather conditions, impact the way in which water moves on the surface of the insulator and may act as a guide for water to accumulate and create water streams that can bridge the sheds. Such water streams will consequently cause a reduction of the leakage current distance and adversely impact the flashover performance of the insulator. Measurements of wet-flashover of aged insulators and experimental model systems are presented.
Keywords :
ageing; composite insulators; flashover; leakage currents; composite insulator; leakage current; nonuniform roughness distribution; surface ageing; wet flashover; Aging; Electrodes; Flashover; Glass; Insulators; Rain; Surface roughness;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2010 Annual Report Conference on
Conference_Location :
West Lafayette, IN
ISSN :
0084-9162
Print_ISBN :
978-1-4244-9468-2
Type :
conf
DOI :
10.1109/CEIDP.2010.5724012
Filename :
5724012
Link To Document :
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