污秽成分对LXY<sub>4</sub>—160绝缘子串交流闪络特性的影响

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Abstract The compositions of pollution on insulator are various, and the diversity of the composition has an effect on the flashover voltage of the insulator. In this paper a 7-unit standard LXY₄—160 glass insulator string is taken as the research subject and its AC flashover characteristics with different compositions of contamination is studied. By combining the test data of the surface pollution layer conductivity and leakage current the effect of the compositions of pollution on the AC flashover characteristics of the insulator string is analyzed. The result shows that the change of soluble or non-soluble compositions will affect the flashover voltage. The flashover voltage of the insulator string grows with the decrease of NaCl content and the increase of CaSO₄ content. Moreover, the flashover voltage also changes along with the change of SiO₂, Al₂O₃ and Fe₂O₃ contents. The variation of the surface pollution layer conductivity and leakage current does exist under different compositions of contamination, and it will affect both the occurring and developing process of partial arc, leading to the change of flashover voltage finally. It is unreasonable to describe the pollution level only using ESDD(equivalent salt deposit density) in natural pollution research. The research results will be of certain values for references to outdoor insulation design and selection.

Key words： Insulator salt deposit density(SDD) pollution composition flashover voltage conductivity of polluted liquid leakage current

Received: 28 May 2013 Published: 27 June 2014

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TM852

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	Articles by authors
	Zhang Zhijin
	Zhang Dongdong
	Liu Xiaohuan
	Jiang Xingliang
	Hu Jianlin

Cite this article:

Zhang Zhijin,Zhang Dongdong,Liu Xiaohuan等. Effect of Pollution Compositions on the AC Flashover Performance of LXY₄—160 Suspension Glass Insulator String[J]. Transactions of China Electrotechnical Society, 2014, 29(4): 298-305.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I4/298

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