高电压技术2018，Vol.44Issue(8)：2516-2524,9.DOI:10.13336/j.1003-6520.hve.20180731011
电场分量对交直流复合电场下油纸绝缘沿面放电特性的影响
Effects of Electrical Field Component on Characteristics of Creepage Discharge in Oil-impregnated Pressboard Under Combined AC/DC Voltage
摘要
Abstract
Creepage discharge phenomenon has a close relationship with the electrical field distribution on the surface of oil-impregnated pressboard (OIP). Thus, we investigate the effects of electrical field component on characteristics of creepage discharge in OIP under combined AC/DC voltage by two electrode configurations. The experimental results show that, for both electrode configurations, there is the lowest under AC voltage, and the flashover voltage increases with DC component of combined AC-DC voltage. Besides, there is no polarity effect in the absence of back electrode configuration, but the polarity effect exits in the presence of back electrode configuration. Furthermore, the flashover voltage under the negative DC component is lower than that under the positive DC component because of higher electronegativity of hydroxyl in the cellulose of OIP. The flashover voltage in the absence of back electrode configuration is approximately 1.5 times that in the presence of back electrode configuration. However, the carriers will enhance collisions with the surface of OIP under higher vertical electrical field component. When the vertical electrical field component is higher, the creepage discharge phenomenon easily happens under a lower AC voltage component stress in the space charge balance condition in OIP. The flashover voltage decreases with a higher vertical electrical field component. When voltage is near the peaks and valleys of AC voltage component, the creepage discharge phenomenon happens.关键词
油纸绝缘板/交直流复合电场/沿面放电/电场分量/闪络电压/空间电荷Key words
oil-impregnated pressboard/combined AC-DC voltage/creepage discharge/electrical field component/flashover voltage/space charge引用本文复制引用
金福宝,周远翔,黄建文,李光范,王明渊..电场分量对交直流复合电场下油纸绝缘沿面放电特性的影响[J].高电压技术,2018,44(8):2516-2524,9.基金项目
国家重点基础研究发展计划(973计划)(2011CB209400) （973计划）
青海省西宁市科技项目计划(2017-K-23).Project support by National Basic Research Program of China(973 Program)(2011CB209400), Science and Technology Research Program of Qinghai Province(2017-K-23). （2017-K-23）
