正极性雷电过电压作用下植物油-纸绝缘系统的预击穿流注传播和击穿特性研究  

Pre-Breakdown Streamer Propagation and Breakdown Characteristics of Vegetable Oil-Paper Insulation System Under Positive Lightning Overvoltage

作　　者：苑捷 李彬[1] 王婷[1] 赵宇[1] 孙永文 YUAN Jie;LI Bin;WANG Ting;ZHAO Yu;SUN Yongwen(State Grid Beijing Electric Power Company,Beijing 100031,China;Beijing Crehoi Sci&Tech Co.,Ltd.,Beijing 100161,China)

机构地区：[1]国网北京市电力公司,北京100031 [2]北京开元浩海科技发展有限公司,北京100161

出　　处：《电瓷避雷器》2021年第2期149-154,共6页Insulators and Surge Arresters

摘　　要：植物绝缘油具有环保、无毒的特点,在替代电力设备绝缘油方面具有巨大应用潜力。为此本研究建立了一套绝缘油电气特性试验系统,该系统由高速相机、针-板电极系统以及冲击电压发生器组成,试验研究了两种棕榈油以及矿物油配合不同老化时间的绝缘纸板的电气特性,通过高速相机结合阴影法拍摄得到了流注发展长度、速度,通过示波器得到了间隙击穿电压。结果显示绝缘纸板的存在会略微增加棕榈油中的50%正极性雷电击穿电压,其中棕榈油浸渍的绝缘纸板的雷电击穿电压低于矿物油;经过老化后,棕榈油和矿物油浸渍纸板的正极性雷电穿电压都降低,存在绝缘纸板时在相同电压水平下,棕榈油中的流注比矿物油中的流注传播得更远。Vegetable insulating oil is environment-friendly and non-toxic,which has great application potential in electrical equipment. A set of insulation oil electrical characteristics test system is established. The system is composed of high-speed camera,needle plate electrode system and impulse voltage generator. The electrical characteristics of two kinds of palm oil and mineral oil with different aging time of insulating paperboard are tested. The streamer development length and speed are obtained by high-speed camera combined with shadow method,and gap breakdown voltage obtained by oscilloscope.The results show that the presence of insulating paperboard will slightly increase 50% of the positive lightning breakdown voltage in palm oil,and the lightning breakdown voltage of palm oil impregnated paperboard is lower than that of mineral oil;after aging,the positive lightning breakdown voltage of palm oil and mineral oil impregnated paperboard decreases,and at the same voltage level,the streamer in palm oil spread further than that in mineral oil.

关 键 词：雷电冲击 非均匀场 棕榈油 油纸绝缘 变压器 

分 类 号：TM215.4[一般工业技术—材料科学与工程] TM41[电气工程—电工理论与新技术]