绝缘纸热老化对油浸绝缘纸空间电荷生成及迁移特性的影响

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Abstract Space charge is easy to accumulate in oil-paper insulation system under high voltage DC field, which will cause the distortion of internal electric field, thus leading to the degradation of material insulation performance. Therefore, research on the influence of insulation paper aging on the space charge properties in oil-paper insulation dielectrics is of great significance. In this respect, the accelerated thermal aging experiment of insulation paper is conducted under 130℃ and then these papers was impregnated with new insulation oil to get the oil-paper aged for different time. Then the injection, migration and dissipation characteristics in oil-paper insulation system were studied with pulsed electro-acoustic(PEA) method. The influence of insulation paper’s thermal aging on the total amount of space charge under voltage on process and decay process, were investigated as well as on the surface trap energy density. The results show that the maximum positive charge density at the anode and the maximum negative charge density within the samples during voltage on process increase while the decay rates of space charges decrease with the insulation paper aging degree.The more the deterioration of the insulation paper, the larger the total amount of space charge with samples and the surface trap energy density. By investigating the influence of oil aging on space charge properties in oil-paper insulation dielectrics, it turns out the thermal agings of insulation oil and paper both will affect the distribution of space charge in oil-paper insulation dielectrics and increase the total amount of space charge, thus causing a great influence on the insulation performance of materials.

Key words： Insulation paper oil-paper insulation thermal aging space charge total amount of space charge pulsed electro-acoustic(PEA)method total amount of space charge surface trap energy density

Received: 14 October 2013 Published: 30 November 2015

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TM85

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	Liao Ruijin
	Liu Haibin
	Zhou Nianrong
	Xia Huanhuan
	Lin Yuandi
	Guo Pei

Cite this article:

Liao Ruijin,Liu Haibin,Zhou Nianrong等. Influence of Insulation Paper’s Thermal Aging on the Formation and Migration Behavior of Space Charge in Oil-Paper Insulation Dielectrics[J]. Transactions of China Electrotechnical Society, 2015, 30(22): 206-214.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I22/206

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