多种外部因素对变压器油冲击击穿特性的影响  

Effect of Multiple Outer Factors on the Impulse Breakdown Characteristics of Transformer Oil

作　　者：姜赤龙[1] 司马文霞[1] 杨庆[1] 袁涛[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2011年第9期2272-2279,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724504)~~

摘　　要：变压器油是保障电力变压器安全运行的重要绝缘介质,在变压器实际运行过程中,变压器油所处运行环境复杂,多种外部因素影响其绝缘性能。为了解其相互关系,设计试验研究了不同电极结构下水分、油温、油中酸值及纤维量对变压器油50%冲击击穿电压以及板-板电极下U-t特性的影响并基于流注理论针对试验结果进行了探讨。试验发现,水分、油温、油中酸值及纤维量的升高均使得变压器油50%冲击击穿电压有所下降。水分、温度、酸值及纤维量对于U-t特性曲线有不同程度的影响,其影响与流注发展模式相关。During the operation of transformer,the ambient environment of the transformer oil is complex.Multiple factors may affect the insulation property of the transformer oil.We experimentally studied the effects of moisture content,oil temperature,acid value and cellulose amount on the 50% impulse breakdown voltage of transformer oil under various electrode configurations,as well as on its voltage-time characteristics under plate-plate electrode.The experimental results demonstrate that the ascendance of moisture content,oil temperature,acid value and cellulose amount decreases the 50% impulse breakdown voltage.The moisture content,oil temperature,acid value and cellulose amount have different effects on the voltage-time characteristics,which are related with the streamer mode.

关 键 词：变压器油 水分 油温 酸值 纤维量 冲击击穿 流注 

分 类 号：TM855[电气工程—高电压与绝缘技术]