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Inicio  /  Energies  /  Vol: 5 Núm: 5Pages1 Par: May (2012)  /  Artículo
ARTÍCULO
TITULO

DC Flashover Performance of Various Types of Ice-Covered Insulator Strings under Low Air Pressure

Jianlin Hu    
Caixin Sun    
Xingliang Jiang    
Daibo Xiao    
Zhijin Zhang and Lichun Shu    

Resumen

In this study, icing flashover performance tests of typical DC porcelain, glass, and composite insulators are systematically carried out in a multifunction artificial climate chamber. The DC icing flashover voltages of seven typical insulators under various conditions of icing thickness, pollution severity before icing, string length, and atmospheric pressure are obtained. The relationships between icing thickness, salt deposit density as well as atmospheric pressure and the 50% icing flashover voltage are analyzed, and the formulas are obtained by regression method. In addition, the DC icing flashover voltage correction method of typical porcelain, glass, and composite insulator in the coexisting condition of high altitude, contamination, and icing is proposed.

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