轨道交通车辆段双流制牵引供电系统在交直流切换供电方式下的电磁场分析
邢江1赵金玉2
Electromagnetic Field Analysis of Dual-power Traction Power Supply System in Rail Transit Depot under AC-DC Switching Power Supply Mode
XING Jiang1ZHAO Jinyu2
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作者信息:1.重庆市铁路（集团）有限公司，401120，重庆
2.西南交通大学电气工程学院，611730，成都
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Affiliation:1.Chongqing Railway Group Co., Ltd., 401120, Chongqing, China
2.School of Electrical Engineering, Southwest Jiaotong University, 611730, Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.08.012
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中图分类号/CLCN:U223.5+1∶U279.1
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栏目/Col:研究报告
摘要:
［目的］交直流双流制牵引供电系统车辆段内股道分布密集，接触网距离较近，不同的供电制式会影响车辆段空间电磁场的分布，因此有必要对轨道交通车辆段双流制牵引供电系统在交直流切换供电方式下的电磁场进行分析。［方法］以重庆市郊铁路跳磴至江津线双福车辆段为依托，运用CDEGS软件构建了车辆段交直流双流制牵引供电系统仿真模型，分析了不同运行工况下车辆段空间电磁场强度分布特性。针对车辆段库内接触网的异常电压现象，综合评估了双流制牵引供电系统车辆段电磁场空间分布对接触网感应电压的影响程度，并提出相应的抑制措施。［结果及结论］交流供电制式和直流供电制式下，接触网空间电场均以带电导体为中心呈对称分布，但空间磁场不完全呈对称分布；带电导体数量越多，空间电场强度和磁场强度越大；交流供电制式下，周围导体的静电感应电压大小与导体间距和电压有关；电磁感应电压与电流成正比；采用直流供电制式时，各种工况下导体的静电感应电压均超出人体安全限值36V。
Abstracts:
［Objective］ The AC-DC (alternating current-direct current) dual-power traction power supply system depot features densely distributed tracks and relatively close catenary clearance. Different power supply modes can affect the distribution of electromagnetic fields in depot spatially. Therefore, it is necessary to analyze the electromagnetic field of rail transit depot dual-power traction power supply systems under AC-DC switching power supply mode. ［Method］ Taking the Shuangfu Depot on Tiaodeng-Jiangjin Line of Chongqing City Railway as the basis, a simulation model of depot AC-DC dual-power traction power supply system is constructed using CDEGS software, and the characteristics of spatial electric and electromagnetic field intensity distribution in the depot under different operating conditions are analyzed. Regarding the abnormal voltage phenomenon on catenary in depot garages, the impact of electromagnetic field spatial distribution in dual-power traction power supply system depot on the induction voltage of catenary is comprehensively evaluated, and corresponding suppression measures are proposed. ［Result & Conclusion］ Under both AC and DC power supply modes, the spatial electric field of catenary is symmetrically distributed around the charged conductors in general, but the spatial magnetic field is not entirely symmetrically distributed. The more charged conductors there are, the greater intensity of spatial electric and electromagnetic fields. Under AC power supply mode, the magnitude of static induction voltage of surrounding conductors is related to the spacing between conductors and the voltage. Electromagnetic induction voltage is proportional to current. When using DC power supply mode, the conductor static induction voltage under various working conditions all exceeds the human safety limit of 36 V.
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