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

Energies

Jianlin Hu¹  Caixin Sun¹  Xingliang Jiang¹  Daibo Xiao²  Zhijin Zhang¹ 

[1] State Key Laboratory of Power Transmission Equipments & System Security and New Technology, College of Electrical Engineering, Chongqing University, Chongqing 400030, China; E-Mails:;Hubei Suizhou Electric Power Supply Company, Suizhou 441300, China; E-Mail:

关键词: ice-covered insulator string;    flashover performance;    DC;    low air pressure;    pollution;   

DOI  :  10.3390/en5051554

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.