摘要
电气化铁路牵引供电系统属于典型的非对称电路,存在不平衡电磁场。针对AT供电方式,研究附加导线正馈线AF布置对工频电场、电信线路静电感应的影响。基于Ansoft Maxwell软件,采用自适应精细网格剖分的有限元方法,建立AT方式复线接触网仿真模型,提出AF线对称布置和等截面二导线裂相优化方案,并对比不同方案的工频电场分布和静电影响。结果表明,采用AF裂相方案,可改善至线路中心线6m范围内作业人员的电场环境,使接触线下4m和5m钢轨附近场强明显削弱,还能有效抑制沿线电信双线回路800Hz感应杂音电动势。
Electrified railway traction power supply system is a typical asymmetrical circuit with unbalanced electromagnetic field.Aiming at the AT power supply mode,the effect of the AF layout for additive wire positive feeder on power frequency electric field and electrostatic induction is studied in this paper.Based on Ansoft Maxwell software,the finite element method of self-adaptive fine mesh refinement is adopted to establish the simulation model of double line catenary under AT power supply mode,and the schemes of AF lines symmetrical layout and split phase optimization for two wires with constant sections are proposed.The power frequency electric field distribution and electrostatic influence of different schemes are also compared.The results show that AF split phase scheme can improve the electric field environment of operators in the range of 6 maway from the central line,significantly weaken the electric field intensity near the rails,and effectively inhibit the 800 Hz induction noise electromotive force of on telecom double line loop along the railway.
作者
沈涛
唐周林
SHEN Tao;TANG Zhoulin(State Grid Hangzhou Yuhang Power Supply Co.,Ltd.,Hangzhou 311100;State Grid Yibin Power Supply Company,Yibin 644000,China)
出处
《电工技术》
2018年第13期28-32,共5页
Electric Engineering
关键词
AT供电方式
接触网
工频电场
静电影响
AT power supply mode
catenary
power frequency electric field
electrostatic influence
