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DC Flashover Performance of Various Types of Ice-Covered Insulator Strings under Low Air Pressure
State Key Laboratory of Power Transmission Equipments & System Security and New Technology, College of Electrical Engineering, Chongqing University, Chongqing 400030, China
Hubei Suizhou Electric Power Supply Company, Suizhou 441300, China
Deceased on 25 November 2011.
* Author to whom correspondence should be addressed.
Received: 9 April 2012; in revised form: 15 May 2012 / Accepted: 15 May 2012 / Published: 21 May 2012
Abstract: 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.
Keywords: ice-covered insulator string; flashover performance; DC; low air pressure; pollution
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MDPI and ACS Style
Hu, J.; Sun, C.; Jiang, X.; Xiao, D.; Zhang, Z.; Shu, L. DC Flashover Performance of Various Types of Ice-Covered Insulator Strings under Low Air Pressure. Energies 2012, 5, 1554-1576.
Hu J, Sun C, Jiang X, Xiao D, Zhang Z, Shu L. DC Flashover Performance of Various Types of Ice-Covered Insulator Strings under Low Air Pressure. Energies. 2012; 5(5):1554-1576.
Hu, Jianlin; Sun, Caixin; Jiang, Xingliang; Xiao, Daibo; Zhang, Zhijin; Shu, Lichun. 2012. "DC Flashover Performance of Various Types of Ice-Covered Insulator Strings under Low Air Pressure." Energies 5, no. 5: 1554-1576.