掺杂纳米Al<sub>2</sub>O<sub>3</sub>对纤维绝缘纸电寿命的影响及机理

doi:10.19595/j.cnki.1000-6753.tces.171531

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Abstract Nanometer Al₂O₃ doping has been proved to be effective in improving the thermal life of cellulose insulation paper. In order to explore its further effect on the electrical life of cellulose insulation paper, nano-Al₂O₃ modified cellulose insulation paper (2% doping amount) and ordinary cellulose insulation paper were prepared in the laboratory. All the experiment samples were impregnated with mineral insulating oil under the same condition. Then the two kinds of samples were carried out accelerating aging test under 6 ranks of voltage with the multi-sample insulation material electrical aging test platform. Taking insulation breakdown failure as the end of life, inverse power function as the electrical aging lifetime model, the index of life expectancy was compared. The results show that, compared to the unmodified oil impregnated paper, modified oil impregnated paper has lower relative dielectric constant and dielectric loss. Moreover, the life index increased by 20%, with higher dielectric aging performance and longer life. Finally, the mechanism of nano-Al₂O₃ doping on the electrical life of oil paper insulation was analyzed in terms of the electric field distribution, dielectric loss and conduction current change before and after modification.

Key words： Cellulose insulation paper nano Al₂O₃ electrical aging electrical aging lifetime

Received: 07 November 2017 Published: 15 October 2018

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TM215.6

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	Mo Yang
	Yang Lijun
	Yan Shuiqiang
	Liao Ruijin
	Yuan Yuan

Cite this article:

Mo Yang,Yang Lijun,Yan Shuiqiang等. Influence and Mechanism of Doped Nano-Al₂O₃ on Electrical Life of Cellulose Insulating Paper[J]. Transactions of China Electrotechnical Society, 2018, 33(19): 4618-4626.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171531 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I19/4618

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