高电压技术2012，Vol.38Issue(10)：2662-2668,7.
脉动直流电压下油中电晕老化过程中油纸绝缘的空间电荷特性
Space Charge Properties of Oil-paper Insulation During Aging Process by Corona in Oil at DC Pulsating Voltage
摘要
Abstract
To analyze the influence of corona in oil at DC pulsating voltage on space charge properties of oil-paper insulation during the insulation aging process,we designed a model of the corona discharge in oil,tested a corona aging under pulsating DC electric field and the space charge properties of insulation paper during the process of the paper's corona aging by using the pulsed electro-acoustic(PEA) method,and preliminarily analyzed the law of change of the space charge properties according to the corona aging degree increase.The results showed that the oil-paper insulation was dominated by negative charge injection when corona aging was in a small extent;with the increase of the extent of corona aging,the charge recombination was increased,and the insulation paper was dominated by positive charge injection gradually.It is concluded that the dissipation of space charge in the bulk after corona aging is faster than that without aging.关键词
油纸绝缘/脉动直流/油中电晕/老化/空间电荷/电声脉冲（PEA）法/换流变压器Key words
oil-paper insulation/pulsating DC/corona in oil/aging/space charge/pulsed electro-acoustic(PEA) method/converter transformer分类
信息技术与安全科学引用本文复制引用
李剑,徐洪,王艳,杨丽君,廖瑞金..脉动直流电压下油中电晕老化过程中油纸绝缘的空间电荷特性[J].高电压技术,2012,38(10):2662-2668,7.基金项目
国家高技术研究发展计划（863计划）重大专项 （）
国家自然科学基金（51177180 （）
51021005） （）
