基于扩展Debye模型的变压器油纸绝缘老化特征量研究

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Abstract In order to extract new characteristic parameters to realize the non-destructive diagnosis of aging state of transformer oil-paper insulation by time domain dielectric response technology, the influence of the aging degree on time-domain dielectric property of oil-paper insulation is investigated. The extended Debye model for oil-paper insulation is further introduced to analyze the influences of thermal degree aging on its parameters. Then four groups of characteristic parameters are extracted to reflect the aging state of the oil-paper insulation. The quantitative relationship between the characteristic parameters and the aging state thus has been established. The test results show that the parameters of the extended Debye model are quite sensitive to the aging state. The parameters of the smallest and the largest time constant branches are both able to characterize the aging state of the insulating pressboards. An obvious exponential rule can be observed between parameters R_min, C_max and the degree of polymerization(DP) of the insulation paper, while the parameters R_max, C_min exhibit an evident linear rules with DP. The extracted characteristic parameters in this paper can be used for the aging assessment of the oil-paper insulation.

Key words： Oil-paper insulation thermal aging polarization and depolarization current extended Debye model characteristic parameters aging assessment

Published: 03 March 2016

PACS:

TM835

Fund:国家自然科学基金资助项目（51277187）

Corresponding Authors: 高竣男,1989年生,博士研究生,研究方向为电气设备绝缘在线监测与故障诊断。E-mail: gaojun_cqu@163.com

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	Articles by authors
	Gao Jun
	Liao Ruijin
	Wang Youyuan
	Yang Lijun
	Hao Jian
	Liu Rui
	Xiao Zhongnan

Cite this article:

Gao Jun,Liao Ruijin,Wang Youyuan等. Ageing Characteristic Quantities of Oil-Paper Insulation for Transformers Based on Extended Debye Model[J]. Transactions of China Electrotechnical Society, 2016, 31(4): 211-217.

URL:

https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I4/211

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