铁道科学与工程学报2018，Vol.15Issue(7)：1839-1847,9.DOI:10.19713/j.cnki.43-1423/u.2018.07.028
接触网绝缘子电晕放电特性仿真研究
Simulation study on corona discharge characteristics of insulators on the contact wire
摘要
Abstract
In order to investigate the corona discharge characteristics of contact wire, chemical reaction and fluid mechanics were combined to propose a two-dimensional numerical model of corona discharge. Simulation calculation and analysis of dynamic distribution of electric field intensity, electron density, electron temperature, ion density in insulator corona discharge were processed by numerical simulation. Through the analysis of the transient simulation, data shows that the insulator surface electric field is influenced by the shape of the insulator is larger. In the metal at both ends and the radius of curvature of the larger outer edge of the umbrella skirt easy to form ionization area, ionization field strength with the discharge time changes. The electronic temperature distribution and the electric field distribution have similar regulars. In the vicinity of the cathode, the electron density increases slowly with the increase of time, the maximum density of electron in the edge area of the anode and umbrella skirt. The electron impact ionization reaction of N2 is the main way of electron production, but the ion density of O2+ is higher than that of N2+ due to ionization threshold energy and charge transfer. In this paper, the two-dimensional numerical model of corona discharge of insulator can simulate the transient process of corona discharge of insulator, which is of great significance to study the physical mechanism of corona discharge.关键词
接触网绝缘子/电晕放电/混合模型/电场强度Key words
contact insulator/corona discharge/mixed model/electric field strength分类
交通工程引用本文复制引用
张友鹏,刘家治,赵珊鹏,董海燕,梁鹏飞..接触网绝缘子电晕放电特性仿真研究[J].铁道科学与工程学报,2018,15(7):1839-1847,9.基金项目
甘肃省自然科学基金资助项目(1606RJZA031) （1606RJZA031）
中国铁路总公司科技资助项目(2016J010-C) （2016J010-C）
