局部放电条件下干式空心电抗器匝间绝缘的电老化特性研究

doi:10.19595/j.cnki.1000-6753.tces.171569

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Abstract The electric aging rule was studied for turn-to-turn insulation of dry-type air core reactor, and partial discharge inception voltage tests and breakdown tests were performed for the model specimen of turn-to-turn insulation of dry-type air core reactor. The electrical aging life test was carried out by constant voltage method and step voltage method when partial discharges occurred in the turn-to-turn insulation of dry-type air core reactor, and the inverse power models of electrical aging life were obtained in two aging ways. The reasons for the difference of the two life equations were analyzed and verified by experiments. The inverse power life equation under constant voltage was corrected for the model of turn-to-turn insulation of dry-type air core reactor after partial discharges happened. From the results, that electric aging rule does not follow the inverse power life model when partial discharges take place in the turn-to-turn insulation of dry-type air core reactor, and the withstand voltage index N and the constant C increase with the increase of the test voltage; Partial discharge may occur under various over-voltages, which is very harmful to inter turn insulation material of dry-type air core reactor. By improving the manufacturing process to improve partial discharge inception voltage, the material with strong resistance to partial discharge used as turn insulation or installing over voltage suppression device to limit the amplitude of over voltage, these methods can prolong the service life of turn-to-turn insulation for dry-type air core reactors.

Key words： Dry-type air core reactor electrical aging turn-to-turn insulation withstand voltage index life equation

Received: 22 November 2017 Published: 12 July 2018

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TM472

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	Nie Hongyan
	Zhang Chaohai
	Gu Zheyi
	Yao Yuanhang
	Liu Xiaosheng

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Nie Hongyan,Zhang Chaohai,Gu Zheyi等. The Research on Electrical Aging Characteristics of Turn-to-Turn Insulation of Dry-Type Air Core Reactor under Partial Discharge[J]. Transactions of China Electrotechnical Society, 2018, 33(13): 3071-3079.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171569 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I13/3071

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