轨道交通铝合金导电轨载流量计算与试验对比分析
张鹏飞
Comparative Analysis of Calculated and Experimental Current Carrying Capacities of Rail Transit Aluminum Alloy Conductive Rails
ZHANG Pengfei
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作者信息:中铁高铁电气装备股份有限公司，721013，宝鸡
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Affiliation:China Railway High-speed Electrification Equipment Co., Ltd., 721013, Baoji, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.07.041
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中图分类号/CLCN:U284.2
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栏目/Col:研究报告
摘要:
［目的］铝合金导电轨普遍应用于轨道交通供电系统，但铝合金导电轨的允许载流量计算值往往同测试值间存在较大的偏差，给工程设计带来不便。因此，有必要研究铝合金导电轨允许载流量与计算载流量之间的关系。［方法］基于Chapoulie-Rols公式和热平衡方程，分别计算了6种不同形状及截面的常见铝合金导电轨允许载流量，并对6种铝合金导电轨进行了允许载流量试验测试；对比分析了导电轨载流量理论计算值与试验测试值间的偏差。［结果及结论］在Chapoulie-Rols公式中引入修正系数，可以让载流量计算值更接近铝合金导电轨实际允许载流量；铝合金导电轨的轨温在加载电流试验3h后基本达到平稳状态。
Abstracts:
［Objective］ AAC (luminum alloy conductive) rails are widely used in rail transit power supply systems. However, a significant deviation often exists between the calculated and tested values of the permissible current carrying capacity of AAC rails, which poses inconvenience to engineering design. Therefore, it is necessary to study the relationship between the permissible current carrying capacity and the calculated current carrying capacity of AAC rails. ［Method］ Based on the Chapoulie-Rols formula and the thermal balance equation, and the permissible current carrying capacities are calculated for six common AAC rails with different shapes and cross-sections respectively. Subsequently, experiments are conducted to test the permissible current carrying capacities of these six AAC rails. A comparative analysis of the difference is performed between theoretical calculated and experimental test values of the conductive rail current carrying capacity. ［Result & Conclusion］ Correction coefficients are introduced into the Chapoulie-Rols formula, which allows for the calculated current carrying capacity closer to the actual permissible current carrying capacity of AAC rails. The rail temperature of AAC rails basically stabilizes after 3 hours of current loading test.
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