跨高铁架空输电线路空间电场扰动分析

Analysis of spatial electric field disturbance of overhead transmission lines across high-speed railway

高压线路的空间电场环境变化会带来严重后果:一方面,影响自身稳定运行,降低供电的可靠性;另一方面,带来生态影响,并损伤邻近结构。穿越架空输电线路的高铁速度快、体积大,为研究跨高铁输电线路空间电场扰动的影响,本文采用有限元分析的方法,建立线路-高铁的二维电场模型并仿真分析。结果可见,高铁穿过架空输电线路会使线路下方的工频电场产生畸变,线路正下方畸变程度最大,越靠近高铁畸变越明显;高铁通过线路下方并引起畸变时,线路的对地距离是一个重要的影响因素。因此,跨高铁对架空输电线路的空间电场扰动较大,需引起关注和采取必要措施。

Changes in the space electric field environment of high-voltage lines can have serious consequences.On the one hand,it affects its own stable operation and reduces the reliability of power supply;on the other hand,it brings ecological impact and damages adjacent structures.The high-speed rail passing through the overhead transmission line is fast and bulky.In order to study the influence of the space electric field disturbance on the high-speed railway transmission line,this paper uses the finite element analysis method to establish the two-dimensional electric field model of the line-high-speed rail and simulates the analysis.As a result,it can be seen that the high-speed rail passing through the overhead transmission line will cause distortion of the power frequency electric field under the line,and the distortion degree is the largest under the line,and the closer to the high-iron distortion,the more obvious;when the high-speed rail passes under the line and causes distortion,the line-to-ground distance is one.Important influencing factors.Therefore,the space electric field disturbance to the overhead transmission line across the high-speed rail is large,and it is necessary to attract attention and take necessary measures.