摘要
分析地铁隧道内敷设的220 V高压电缆对地铁电力、通信与信号等设备的工频磁场影响。首先,采用有限元法建立地铁隧道内敷设的220 V高压电缆及隧道结构的二维仿真模型,分析电缆正常工作和发生故障运行时的磁场分布,以及对通信线路、直流牵引供电线路、钢轨等产生的感应电动势波形及影响;然后,提出相应的工频磁场削弱方法,并进行二维有限元仿真分析。结果表明,采用隧道电缆排列和屏蔽设计可有效地减少工频磁场对公共地铁隧道的干扰。为了验证分析结果的正确性,对实际隧道内220 V电缆的磁场进行了测量,测试结果与仿真结果一致。
The influence of magnetic field caused by220kV high-voltage cable in subway tunnel over metro power,communications and signaling devices is analyzed.Firstly,a2D simulation model of220kV high-voltage cable and the tunnel structure is established by using finite element method(FEM),the magnetic field distributions under normal condition and fault condition,the influence of220kV high-voltage cable on communication lines,on DC traction current supply system and subway track are analyzed.Secondly,corresponding methods to weaken the power frequency magnetic field are proposed,a2D finite element simulation analysis is conducted.All the results show that the power frequency magnetic field disturbances are obviously reduced by using cable array in tunnel and the shielding design methods.Lastly,to verify the correctness of the analytic results,a practical220kV cable tunnel is measured,the data obtained are consistent with that of the simulation.
作者
黄磊
李晨
陈庭记
李雪
张瑞永
吴述关
HUANG Lei;LI Chen;CHEN Tingji;LI Xue;ZHANG Ruiyong;WU Shuguan(School of Electrical Engineering,Southeast University,210096,Nanjing,China)
出处
《城市轨道交通研究》
北大核心
2017年第8期69-74,共6页
Urban Mass Transit
基金
国家电网江苏电力公司重点科技项目(J2015053)
关键词
地铁隧道
高压电缆
工频磁场
电磁屏蔽
有限元法
subway tunnel
high-voltage cable
power frequency magnetic filed
electro-magnetic shield
finite element method
