摘要
液氮环境中绝缘材料的沿面放电特性对超导电力设备的外绝缘设计至关重要。笔者设计环-环电极和尖-板电极,模拟均匀电场和不均匀电场,研究了低温环境下较常用的环氧树脂在液氮环境中的沿面闪络特性,得出了环氧树脂在液氮环境中两种电极下的沿面闪络电压的韦伯分布概率图,利用MATLAB软件拟合出服从韦伯分布0.1%闪络概率的沿面闪络电压和爬电距离的关系曲线,通过分析比较可见,环氧树脂在液氮环境中的沿面闪络电压受电极间距和电场不均度的影响较大,同时为高温超导电力设备的绝缘设计提供参考。
The surface flashover characteristic of insulating materials in liquid nitrogen environment is an important content to external insulation design of superconducting power equipment. The ring - the ring electrode and tip - plate electrode are designed to simulate a uniform electric field and a uneven electric field, through the research of the surface flashover characteristic of epoxy, which is commonly used under low temperature, in liquid nitrogen environment, the weibull distribution probability graph of surface flashover voltage of epoxy under two different electrode in liquid nitrogen, the curve of 0.1% probability of impact flashover along the surface voltage and creepage distances is fit by MATLAB software, through the analysis comparison, the surface flashover voltage of Epoxy resin in liquid nitrogen is influenced greatly by the electrode spacing and farm inequality, which provide a reference for the insulation design of high-temperature superconducting power equipment.
出处
《电瓷避雷器》
CAS
北大核心
2013年第5期40-43,共4页
Insulators and Surge Arresters
关键词
沿面闪络
韦伯分布
爬电距离
液氮环境
电场不均匀度
surface flashover
weibull distribution
creepage distance
liquid nitrogen environment
electric field unevenness
