中国电机工程学报2012，Vol.32Issue(16)：173-181,9.
绝缘油老化对油纸绝缘介质空间电荷形成及迁移特性的影响
Influence of Oil Aging on the Formation and Migration Behavior of Space Charge in Oil-paper Insulation Dielectrics
摘要
Abstract
Investigating the influence of oil aging or insulation paper aging on the formation and migration of space charge in oil-paper insulation dielectrics during its ageing process is helpful to provide the method to restrain the space charge formation. In this paper, the insulation oil was thermally aged at 130 ~C for up to 22 days and its ageing condition was identified. The space charge behavior of the oil-paper sample impregnated with oil aged for different times was investigated by the pulsed electro-acoustic （PEA） method. The space chargemeasurements were taken at various times during the stressing period of both voltage-on and voltage-off（short-circuit condition）, as well as the decay process. The influence of oil ageing on the total charge amount, the surface trap energy density and the electric field distortion was analyzed. Results show that under the negative polarity power supply, the more the deterioration of the oil, the larger the maximum charge density of positive charge injected into the paper near to the anode and the negative charge accumulated at the paper-paper interface near to the anode. The total amount of charge, the surface trap energy density and the electric field distortion of the oil-paper sample increase with the oil aging degree.关键词
绝缘油/热老化/油纸绝缘/空间电荷/电声脉冲法/电荷总量/表面陷阱能级密度/电场畸变率Key words
insulation oil/thermal aging/oil-paper insulation/space charge/pulsed electro-acoustic (PEA)method/total amount of charge/surface trap energy density/electric field distortion分类
信息技术与安全科学引用本文复制引用
郝建,廖瑞金,George Chen,严家明..绝缘油老化对油纸绝缘介质空间电荷形成及迁移特性的影响[J].中国电机工程学报,2012,32(16):173-181,9.基金项目
国家创新研究群体基金项目 （）
国家重点基础研究发展计划项目（973项目）（2009CB724505-1）. （）
