地铁杂散电流对埋地金属的干扰仿真分析
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周航(1975—),男,高级工程师,南宁轨道交通集团有限责任公司运营分公司副总经理;研究方向为城市轨道交通牵引供电系统运行与检修,机电系统的智能运维。E-mail:zzac9064@163.com

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U284.93;TG172.84

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国家自然科学基金青年基金项目(51807065);江西省重点研发计划一般项目(20202BBEL53015)


Simulation Analysis of Interference of Subway Stray Current on Buried Metals
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    摘要:

    针对杂散电流对地铁沿线埋地管道腐蚀区域严重程度的不确定问题,通过建立杂散电流的三维有限元分析模型,研究地铁上下行列车运行方式下杂散电流的分布规律,埋地管道上阴极和阳极区域的动态变化过程。 在仅考虑阳极杂散电流影响下, 通过对比不同模型,判断列车在运行过程中埋地管道受干扰的区域和干扰程度。 结果表明:当两列车同时相向运行时,埋地管道上干扰程度较强区域主要分布在两侧,且腐蚀区域关于管道的中心位置对称;当上行列车比下行列车提前启动 18,37 s 和 55 s 时,埋地管道上干扰程度较强区域主要分布在管道右侧,其中,上行列车比下行列车提前启动 55 s 时,埋地管道上存在较大的干扰电流密度,高达 18 A/m2 。 在地铁杂散电流的后期防护中,可以结合有限元模型对管道受干扰严重区域采取相应措施。

    Abstract:

    Given the uncertainty of the severity of stray current on the corrosion area of buried pipelines along the subway line, a three-dimensional finite element analysis model of stray current is established to study the distribution of stray current under the operation mode of subway upward and downward trains and the dynamic changing process of the cathode and anode area on the buried pipeline. Considering only the influence of anode stray current, the interference area and degree of the buried pipeline during train operation are judged by comparing different models. The results show that when the two trains are running in opposite directions at the same time, the interference area of the buried pipeline is mainly distributed on both sides, and the interference area is symmetrical concerning the central position of the pipeline. When the upward train starts 18,37 s and 55 s earlier than the downward train, the areas with strong interference degrees on the buried pipeline are mainly distributed on the right side of the pipeline. Among them, when the upward train starts 55 s earlier than the downward train, there is a large interference current density on the buried pipeline, up to 18 A/m2 . In the later protection of subway stray current, corresponding measures can be taken for the serious interference area of pipeline in combination with finite element model.

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周航,张敬,李军,韦庭三.地铁杂散电流对埋地金属的干扰仿真分析[J].华东交通大学学报,2022,39(6):1-9.

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  • 在线发布日期: 2022-12-15
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