矿用干式变压器诺美(Nomex)绝缘纸多因子老化过程的降解规律

doi:10.11896/cldb.19090149

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Abstract The insulation state of Nomex paper used in mining dry Transformer could directly influence the reliability of power supply and production safety in underground coal mine, therefore, it is necessary to study the aging law and decomposition characteristics of Nomex paper, which could lay the theoretical foundation for the state evaluation, life analysis and fault diagnosis of mining dry Transformer. In this paper, the accele-rated aging test under the multi-factor combination of Nomex insulation paper was carried out. The effects of voltage, temperature and moisture on the polymerization degree of Nomex paper were analyzed in detail. The variation of kinetic parameters of Nomex paper with DP was investigated by thermal analysis.The results showed that voltage, temperature and moisture factors all accelerated the aging of Nomex insulation paper, and that temperature had a greater effect on insulation aging than voltage when there was moisture; With the deepening of the aging degree, the activation energy of Nomex paper shows the trend of first increasing and then decreasing. The thermal enthalpy value and the degree of polymerization are exponentially attenuated. It could be seen that the thermal enthalpy value can be used as one of the main parameters to evaluate the performance of Nomex insulation paper.

Key words： dry-type transformer nomex insulating paper multi-factor degree of polymerization activation energy enthalpy

Published: 02 December 2020

CLC number:

TM852

Fund:This work was financially supported by the National Natural Science Foundation of China (51577123).

About author:: Jinmei Caoa gratuate student at Taiyuan University of Technology in Septemper 2017, focusing on the research of decomposition characteristics of Nomex insulation paper in the Mining Dry Type Transformer under multi-factor.Jiancheng Songreceived the B.Sc. degree from Taiyuan University of Technology, China, in 1982, the M.Sc. degree from Newcastle University, England, in 1987. Currently, he is a professor of the College of Electrical and Power Engineering at Taiyuan University of Technology. He has experience in the field of condition assessment, remaining life assessment and intellectual automation technology. He has performed a number of electrical failure investigations about coal mine.

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	CAO Jinmei
	LI Lu
	ZHANG Rui
	LI Yongzhi
	WANG Zhengyu
	CHEN Kun
	SONG Jiancheng

Cite this article:

CAO Jinmei,LI Lu,ZHANG Rui, et al. Aging Degradation Law of Nomex Insulating Paper for Mining Dry-Type Transformer Under Multi-Factor[J]. Materials Reports, 2020, 34(22): 22195-22200.

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http://www.mater-rep.com/EN/10.11896/cldb.19090149 OR http://www.mater-rep.com/EN/Y2020/V34/I22/22195

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