城市轨道交通车辆基地弓网异常烧灼对策
李泽宇
Countermeasures for Abnormal Arcing and Burning of Pantograph-Catenary System in Urban Rail Transit Vehicle Base
LI Zeyu
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作者信息:上海地铁维护保障有限公司， 200070， 上海
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Affiliation:Shanghai Metro Maintenance Support Co., Ltd., 200070, 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.20241139
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中图分类号/CLCN:U279.1
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栏目/Col:供电与能源
摘要:
［目的］城市轨道交通车辆基地内接触线烧灼现象普遍存在，主要集中分布于列车停车位受电弓对应区域。该现象轻则降低弓网运行平顺性，引发跳闸等接触网运行故障，重则导致接触线断裂等重大弓网事故。为了确保接触网设备的可靠性、弓网系统的运行安全及列车运营的稳定性，亟须采取有效措施解决车辆基地弓网异常烧灼问题。［方法］以上海轨道交通18号线航头基地开通后停车库内发生的接触网烧灼事件为例，从受电弓滑块与接触线接触情况、升弓高度及升弓压力、受电弓载流量、受电弓和接触网接触点温度、受电弓输入电流等方面对弓网异常烧灼故障原因进行排查，提出弓网异常烧灼对策。对18号线18A01型列车的牵引系统软件进行了优化，在停车库内对软件优化前后的列车进行重复升落弓试验与效果验证。［结果及结论］18号线航头基地接触线烧灼现象的根本原因是：升弓过程中弓网系统进入稳定接触状态的过渡时间与高速断路器闭合延时存在时序失配。现场验证及6个月跟踪监测表明：优化后的软件可有效预防停车库内接触线烧灼现象，航头基地停车库内未再出现接触线烧灼痕迹。
Abstracts:
［Objective］ Abnormal arcing and burning of contact wire are commonly observed in urban rail transit vehicle bases, primarily concentrated in pantograph-corresponding areas at train parking lots. Minor cases can reduce the smoothness of PC (pantograph-catenary) operation, causing tripping and other contact network operational malfunctions, while severe cases may lead to serious PC accidents such as contact wire breakage. To ensure the reliability of catenary equipment, the PC system operational safety and train operational stability, it is crucial to adopt effective measures to address abnormal arcing and burning in PC system in vehicle bases.［Method］ Taking the catenary arcing and burning incidents in the parking garage of Hangtou Depot on Shanghai Rail Transit Line 18 after putting into use as an example, the causes of abnormal arcing and burning in PC system are investigated from multiple aspects: the contact condition between pantograph slider and contact wire, pantograph lifting height and pressure, pantograph current-carrying capacity, temperature at the contact points between pantograph and catenary, and pantograph input current. Countermeasures are proposed based on these investigations. The traction system software of the 18A01 train model on Line 18 is optimized, and repeated pantograph lifting and lowering tests are conducted in the parking garage to validate the effectiveness before and after the software optimization.［Result & Conclusion］ The root cause of the arcing and burning phenomenon in Line 18 Hangtou Depot is identified as a timing mismatch between the transition period of PC system entering a stable contact state and the closing delay of the high-speed circuit breaker during the pantograph lifting process. On-site verification and six months of follow-up monitoring demonstrate that the optimized software effectively prevented the occurrence of arcing and burning in the parking garage. No further signs of contact wire burning have appeared in the Hangtou Depot again.
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