高速气流环境绝缘子污闪研究

发布时间：2018-05-29 21:26

本文选题：机车 + 绝缘子　；参考：《高压电器》2014年12期

【摘要】：在分析了自然环境直、交流闪络模型基础上,研究了电气化铁路间歇性高速风环境下绝缘子表面闪络的影响因素、高速气流环境、绝缘子表面气压分布不均、周围风速改变;在该环境下污秽、雾、雨将会短时间形成规律性分布,构成导电通道,产生电弧,发生闪络。在干燥状态高速风环境下绝缘子表面产生电荷,不均匀分布电荷引起表面电场畸变,诱发闪络。利用流体力学知识通过分析特定粘度流体一定风速下在绝缘子表面的分布状况,从而分析绝缘子污闪。同时,由于不同速度的列车风导致边界层变化、吹弧作用会对闪络造成不同程度的影响,根据不同速度与闪络电压的关系对闪络模型进行修正。
[Abstract]:Based on the analysis of the direct and AC flashover models of natural environment, the influence factors of insulator surface flashover under intermittent high speed wind environment of electrified railway are studied, such as the high speed airflow environment, the uneven distribution of air pressure on the surface of insulator, and the change of wind speed around the insulator. In this environment, pollution, fog and rain will form a regular distribution in a short time, forming a conductive channel, arcing and flashover. In the dry high speed wind environment, the insulator surface produces the charge, and the non-uniform distribution of the charge causes the surface electric field distortion, which induces the flashover. Based on the knowledge of fluid mechanics, the insulator flashover is analyzed by analyzing the distribution of fluid with certain viscosity under certain wind speed on the surface of insulator. At the same time, the flashover model is modified according to the relationship between different speed and flashover voltage because of the variation of boundary layer caused by different speed of train wind, and the effect of blowing arc on flashover.
【作者单位】：南车青岛四方机车车辆股份有限公司技术中心;西南交通大学电气工程学院;
【基金】：国家重点基础研究发展计划项(2011CB111005) 国家自然科学基金项目(51107104)~~
【分类号】：TM216

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