高电压技术2011，Vol.37Issue(5)：1057-1065,9.
变压器油纸绝缘介质在直流电场中的空间电荷输运特性
Space Charge Transport Properties of Oil-paper Insulation Materials Under DC Field Used in Transformer
摘要
Abstract
In order to realize the space charge characteristics of common kraft paper and thermally-stabilized paper both impregnated by mineral oil under DC field, the pulsed electro-acoustic method was used to measure the space charge distribution of samples under 3 different level DC field. The changing of the total amount space charge in these two kinds of samples within the applied voltage on and removed was discussed. Results show that the space charge injection threshold voltage of the Kraft paper is lower than that of the thermally-stabilized paper, and charge injection is easier for the Kraft paper. When electric filed is applied, the charge injection, transport, and accumulation are more obvious in the Kraft paper than those of the thermally-stabilized paper, and the total amounts of injection space charge and injection velocity increase as the applied electric filed of both kinds of paper increases. After the applied electric filed is removed, the total amount of charge left in bulk for the Kraft paper is more than that of the thermally-stabilized paper, and the decay of charge in the Kraft paper is slower. Moreover, the charge left in the bulk for both kinds of paper is mainly trapped by the shallow traps in the materials, but the trap density in the Kraft paper is higher than that in the thermally-stabilized paper.关键词
变压器/油纸绝缘/空间电荷/电声脉冲(PEA)/输运/陷阱Key words
transformer/ oil-paper insulation/ space charge/ pulsed electro-acoustic(PEA)/ transport/ trap分类
信息技术与安全科学引用本文复制引用
廖瑞金,李伟,杨丽君,郝建,周天春,周欣..变压器油纸绝缘介质在直流电场中的空间电荷输运特性[J].高电压技术,2011,37(5):1057-1065,9.基金项目
国家重点基础研究发展计划(973计划)(2009CB724505-1) （973计划）
国家创新研究群体基金(51021005) （51021005）
中央高校基本科研业务费资助项目(CDJXS11150004). （CDJXS11150004）
