基于特征参量<em>K</em><sub>h10</sub>的复合绝缘子污闪试验

doi:10.19595/j.cnki.1000-6753.tces.191447

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Abstract This paper focuses on pollution flashover test for composite insulators based on the characteristic parameter K_h10. The leakage current and K_h10 of insulators were measured during wetting. The parameter K_h10 was used to characterize the wetting state of pollution layer. It is found that measuring K_h10 on artificial polluted insulators with large size should keep electric field on the measuring area as uniform as possible. The measurement voltage for K_h10 should not be too high, and the obvious change of polluted layer affected by strong discharge during wetting should be avoided. Method for the wetting test of composite insulators was improved. By measuring K_h10 on certain sheds, the surface state was used to represent the wetting state of the entire insulator. The correlation between wetting state of polluted layer and flashover voltage of insulators was studied. Test results show that characteristic parameter K_h10 can also effectively represent the wetting state of polluted layer for real insulators with large size. For the same type composite insulator, the flashover voltage is close if the K_h10 value is the same before flashover test. And this conclusion is not affected by the difference in pollution grade, pollution composition and hydrophobicity. This study not only improves artificial pollution test method of composite insulators, but also optimizes the condition monitoring method of natural polluted composite insulators.

Key words： Characteristic parameter K_h10 composite insulator leakage current wetting process

Received: 06 November 2019

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TM721

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	Articles by authors
	Dai Hanqi
	Sun Yue
	Wang Liming

Cite this article:

Dai Hanqi,Sun Yue,Wang Liming. Pollution Flashover for Composite Insulators Based on Characteristic Parameter K_h10[J]. Transactions of China Electrotechnical Society, 2020, 35(24): 5207-5217.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191447 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I24/5207

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