交直流复合电压下铜颗粒在油中的分布及对绝缘油击穿特性的影响

doi:10.19595/j.cnki.1000-6753.tces.171751

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Abstract In order to study the motion distribution of solid particles and its influence on breakdown strength of insulating oil under combined AC and DC voltages, the motion distribution of copper microparticles and the breakdown voltage of insulating oil with different particle concentration under AC voltage, DC voltage and the combined AC and DC voltage with the ratio of AC to DC equal to 1 and 1/3 of two different electrode systems are investigated in this paper. The copper particle effect on the breakdown strength of insulating oil is discussed with the motion distribution of particle. The results show that the increase of DC component and particle concentration will promote the formation of copper particle bridge and increase the conduction current significantly. The breakdown voltage of insulating oil with copper particle at combined AC and DC voltage approximately obeys Weibull distribution. The breakdown voltage of insulating oil decreases with the increase of the DC voltage component in combined AC and DC voltage. Meanwhile, the breakdown voltage and the logarithm of particle number approximately satisfy the linear relationship.

Key words： Combined AC and DC voltage motion distribution breakdown voltage copper particle bridge Weibull distribution

Received: 29 December 2017 Published: 17 December 2018

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TM855

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	Wang Youyuan
	Li Xi
	Li Yuanlong
	Wei Chao
	Lu Yuncai

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Wang Youyuan,Li Xi,Li Yuanlong等. Distribution of Copper Particle in Insulating Oil and Its Influence on Breakdown Strength of Insulating Oil under Combined AC and DC Voltage[J]. Transactions of China Electrotechnical Society, 2018, 33(23): 5581-5590.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171751 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I23/5581

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