广州地铁22号线交流牵引供电系统电磁干扰问题分析
赵云云1桑国阳1龙意仁2李鲲鹏1,3叶俊4曹晓斌3
Analysis of Electromagnetic Interference Problems in AC Traction Power Supply System of Guangzhou Metro Line 22
ZHAO Yunyun1SANG Guoyang1LONG Yiren2LI Kunpeng1,3YE Jun4CAO Xiaobin3
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作者信息:1.广州地铁设计研究院股份有限公司， 510010， 广州
2.中国能源建设集团湖南省电力设计院有限公司， 410007， 长沙
3.西南交通大学电气工程学院， 611756， 成都
4.阳光电源股份有限公司， 230088， 合肥
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Affiliation:1.Guangzhou Metro Design & Research Institute Co., Ltd., 510010, Guangzhou, China
2.China Energy Construction Group Hunan Electric Power Design Institute Co., Ltd., 410007, Changsha, China
3.School of Electrical Engineering, Southwest Jiaotong University, 611756, Chengdu, China
4.Sunshine Power Supply Co., Ltd., 230088, Hefei, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.02.023
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中图分类号/CLCN:U231-8
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栏目/Col:研究报告
摘要:
［目的］当地铁线路正常运行时，由于钢轨对地不能做到完全绝缘，采用交流牵引供电系统的地铁会对邻近金属油气管道产生交流干扰。因此，有必要研究地铁交流牵引供电系统对外部电磁干扰的问题。［方法］以广州某金属油气管道与广州地铁22号线并行段为例，建立地铁隧道与金属油气管道耦合模型，对金属油气管道进行电磁干扰仿真分析；计算了与隧道呈不同夹角的油气管道各段的电磁感应电压、地电位和涂层耐受电压，分析了电磁干扰的主要影响因素。［结果及结论］交流牵引供电制式下，管道涂层实际承受电压为涂层内部金属管道表面的电压和外部土壤中的地电位的差值，地铁隧道在金属管道表面产生的感应电压幅值是土壤地电位幅值的10倍以上，金属油气管道受到的电磁干扰以管道与地铁的电磁感应电压为主；金属油气管道及地铁隧道并行段是产生电磁干扰的主要区段；增加回流线可以极大地降低金属油气管道的电磁感应电压，回流线的位置与数量对减少电磁干扰效果有极大的影响。
Abstracts:
［Objective］ During the normal operation of metro lines, due to incomplete rail-ground insulation, metro that adopts AC (alternating current) traction power supply system can cause electromagnetic interference on adjacent metallic oil and gas pipelines. Therefore, it is necessary to study the external electromagnetic interference problem caused by metro AC traction power supply system. ［Method］ Taking the parallel section of a metallic oil and gas pipeline in Guangzhou and Guangzhou Metro Line 22 as example, a coupled model of the metro tunnel and the pipeline is established to simulate and analyze electromagnetic interference on the pipeline. The electromagnetic induction voltages, ground potentials, and coating tolerance voltages of different segments of the oil and gas pipeline with varying angles to the tunnel are calculated, and the main influencing factors of electromagnetic interference are analyzed. ［Result & Conclusion］ Under the format of AC traction power supply system, the actual voltage endured by the pipeline coating is the difference between the voltage on the surface of the internal metal pipeline and the ground potential in the external soil. The induced voltage amplitude generated by the metro tunnel on metallic pipeline surface is more than 10 times the amplitude of soil ground potential, with the electromagnetic induction voltage between the pipeline and the metro being the main factor causing electromagnetic interference on the metallic oil and gas pipeline. The parallel section of the metallic oil and gas pipeline and the metro tunnel is the main area generating electromagnetic interference. Adding return line can significantly reduce the electromagnetic induction voltage on the metallic oil and gas pipeline, and the position and quantity of the return line have a significant impact on reducing electromagnetic interference.
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