站台门与钢轨等电位连接方式下的绝缘防护测试及保障措施
张明锐1曹庭嵩1刘金叶2刘悦2
Insulation Protection Tests and Safeguard Measures under Equipotential Connection of Platform Door and Steel Rails
ZHANG Mingrui1CAO Tingsong1LIU Jinye2LIU Yue2
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作者信息:1.同济大学电子与信息工程学院，201804，上海
2.上海申通地铁集团有限公司，201103，上海
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Affiliation:1.Electronic and Information Engineering School，Tongji University, 201804, Shanghai, China
2.Shanghai Shentong Metro Group Co., Ltd., 201103, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.09.009
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中图分类号/CLCN:U223.6+1∶U231
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栏目/Col:学术专论
摘要:
［目的］站台门系统与钢轨等电位连接方式下，当站台门系统的对地绝缘降低时，容易产生放电现象。为确保乘客的乘坐安全，应基于该方式，建立有效的站台门绝缘保障措施。［方法］从站台门电气绝缘机理和人体电气安全2个维度分析了站台门与钢轨等电位连接的优势。建立了轨电位计算模型，对常规工况、极端工况2种工况下站台门处轨电位进行了仿真。采用多参数单一变化法，分析了常规工况下各回流系统参数不同取值对站台门轨电位的影响，计算了极端工况下的站台门轨电位分布曲线。提出了站台门绝缘的测试方法及站台门绝缘维护的相关措施。［结果及结论］采用站台门系统与钢轨等电位连接方式时，轨电位的最大值不应超过60V。极端工况下，站台门处轨电位有可能高于该阈值，此时乘客的人身安全可能会受到威胁，须采取有效措施，确保站台门的绝缘有效性。
Abstracts:
［Objective］ Under the equipotential connection method between platform door system and steel rail, once the ground insulation of the platform door system weakens, the discharge is prone to occur. In order to ensure passengers′ safety, effective insulation safeguard measures for the platform door should be taken based on this method. ［Method］ The advantages of equipotential connection of the platform door and the steel rail are analyzed from the two dimensions of the electrical insulation mechanism of the platform door and human electrical safety. A rail potential calculation model is established to simulate the rail potential at the platform door under normal and extreme working conditions. The influence of the parameters of the return current system on the above mentioned rail potential under normal working conditions is analyzed by using the method of changing the value of one single parameter at a time, and the distribution curve of the above rail potential under extreme working conditions is calculated. The testing method and the relevant maintenance measures for the platform door insulation are put forward. ［Result & Conclusion］ When the equipotential connection method of the platform door system and the steel rail is used, the maximum value of the rail potential should not exceed 60 V. Under extreme working conditions, the rail potential at the platform door may exceed the above threshold, which may pose threat to the physical safety of the passengers. Therefore, it is necessary to take effective measures to ensure the effectiveness of the platform door insulation.
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