项目名称: 基于等离子体参量诊断的大气压下绝缘沿面闪络机理研究
项目编号: No.51207019
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 电气科学与工程学科
项目作者: 蔡新景
作者单位: 东北电力大学
项目金额: 27万元
中文摘要: 目前,人们对大气压下绝缘沿面闪络的实验研究基本停留在研究外部参数如绝缘子形状、材料特性、介质环境等对沿面闪络电压的影响,而很少直接测量沿面闪络发展过程的一些内部物理参数,这种状况导致沿面闪络的一些机理性的问题没有完全解决。本项目将对大气压下绝缘沿面闪络进行深入的实验研究和理论分析。将先进的物理诊断设备(如激光干涉仪、光电倍增管等)应用到绝缘沿面闪络实验中来,将沿面闪络发展过程和电子密度演化过程、电子漂移速度等直接联系起来。另外,根据实验结果,建立更准确的物理模型。这些工作将促进大气压下绝缘沿面放电理论和高电压外绝缘技术的发展。
中文关键词: 沿面闪络;光电离;流注放电;电子输运系数;多项近似
英文摘要: Presently,a significant amount of the research related to dielectric surface flashover at atmospheric conditions is of an applied nature,such as the dependence of the flashover voltage on the following parameters:spacer profile,dielectric material,surrouding environment,and so on.In the literature on surface flashover,which has few measurements of fundamental parameters during its development process,there are some mechanisms yet to be understood.The purpose of this research is to develop a science-based understanding of surface flashover at atmosphere pressure.A practical way to document the dynamics of surface flashover is direct measurements of electron density evolution profile,electron drift velocity etc. with modern diagnostic tools such as laser interferometer,photomultiplier tube etc..Further work on surface flashover is improved modeling based on the above results.Such investigations will no doubt add to the understanding of dielectric surface flashover at atmospheric conditions and promote the development of high voltage and insulation technology.
英文关键词: surface flashover;photoionization;streamer discharge;electron transport coefficient;multi-term approximation