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	Space charge phenomena in oil-paper insulation materials under high voltage direct current
	Wang Yun-shan ; Zhou Yuan-xiang ; Li Guang-fan ; Wang Ning-hua ; Liu Ying-yan ; Sun Qing-hua ; Li Bo ; Li Peng ; Cheng Huan-chao
	2010-10-12 ; 2010-10-12
关键词	Practical/ insulating materials paper polyethylene insulation space charge/ high voltage direct current pulsed electroacoustic method HVDC space charge accumulation lower field stress electrical field distortion oil-paper insulation material conductivity polyethylene low density polyethylene/ B2830C Organic insulation B2810D Dielectric breakdown and discharges
中文摘要	This paper studied the space charge characteristics of oil-paper insulation materials by the pulsed electro-acoustic (PEA) method. The effects of applied HVDC on space charge accumulation in oil paper was discussed. This paper also discusses the relationship between space charge and breakdown in oil paper. The result shows that the space charge comes from ionization at lower field stress. When the stress is higher, injection of homo carriers occurs at cathode first and anode later. The space charge inside oil-paper sample results in an electrical field distortion up to 40%. The oil-paper insulation material's conductivity is much larger compared with polyethylene, so the space charge dissipates fast when the applied field is removed. The experiment showed that most of the space charge in oil paper dissipated in 30 seconds after the source was removed, which is very different from other insulation materials such as low density polyethylene (LDPE). The fast dissipation of space charge will play the key role in oil-paper material's insulating performance in condition of polarity reversal under HVDC. The injection and movement of space charge result in the degradation and breakdown of the oil-paper insulation material. When the applied electrical field rose to 50 kV/mm-57 kV/mm, the oil-paper material got breakdown in a short time. During this process, an obvious movement of space charge was observed.
语种	中文
出版者	Editorial Board of High Voltage Engineering ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/82563]
专题	清华大学
推荐引用方式 GB/T 7714	Wang Yun-shan,Zhou Yuan-xiang,Li Guang-fan,et al. Space charge phenomena in oil-paper insulation materials under high voltage direct current[J],2010, 2010.
APA	Wang Yun-shan.,Zhou Yuan-xiang.,Li Guang-fan.,Wang Ning-hua.,Liu Ying-yan.,...&Cheng Huan-chao.(2010).Space charge phenomena in oil-paper insulation materials under high voltage direct current..
MLA	Wang Yun-shan,et al."Space charge phenomena in oil-paper insulation materials under high voltage direct current".(2010).

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