【摘 要】
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In this paper,the DC flashover characteristics of iced insulator strings were explored in the multi-functional artificial climate chamber by four methods,namely
【机 构】
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State Key Laboratory of Power Transmission Equipment ~ System Security and New Technology,Hubei Suiz
论文部分内容阅读
In this paper,the DC flashover characteristics of iced insulator strings were explored in the multi-functional artificial climate chamber by four methods,namely,the average flashover voltage method,the minimum flashover voltage method（U-curve method）,the maximum withstand method and the 50% withstand method.Typical DC porcelain insulator strings and composite insulators were used as specimens.The results indicate that the average flashover voltage and the minimum flashover voltage obtained by the average flashover voltage method and the minimum flashover voltage method,respectively,obey a normal distribution.The 50% flashover voltage could be gained by the two methods with a minimal test number of nine and were about 8.0%～9.8% and 3.8%～5.9% respectively higher than that gained by the 50% withstand method.This justified the feasibility of employing the Ucurve method and the average flashover voltage method to study the flashover characteristics of iced insulators and their affecting factors.
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