摘要
重载机车所需牵引电流大且桥隧区段接地不良,致使机车运行途中钢轨电位急剧抬升。针对大准铁路桥隧区段的钢轨电位分布进行理论分析,并调用ATP/EMTP程序,在考虑横向连接分布方式前提下建立桥隧区段仿真模型,并与现场测量的结果相较,该模型最大误差在7%以内;着重分析吸上线间距、桥隧区段贯通地线接地情况对钢轨电位影响,并据此提出钢轨电位抑制方案;采用上述模型对既有方案进行验证,结果表明贯通地线在桥隧区段间隔50 m接地可以显著降低钢轨电位近50 V,并且贯通地线仅在桥隧两端接地,同时增设吸上线既能降低钢轨电位约40 V又兼具工程经济性。
The traction current required by heavy-haul locomotive is large and the bridge and tunnel sections are poorly grounded,which result in the sharp rise of rail potential during locomotive operation.In this paper,the rail potential distribution in the bridge and tunnel sections of Dazhun railway is analyzed theoretically,and ATP/EMTP program is used to establish the simulation model of this section under the premise of considering the transverse connection distribution.Compared with the fi eld measurement results,the maximum error of the model is less than 7%.The infl uence of the space between the boosting cable and the grounding of the combined through ground wire in this section on the rail potential is particularly analyzed,and the rail potential suppression scheme is put forward accordingly.The above model is used to verify the existing scheme,and the results show that the combined through ground wire grounded at an interval of 50 m in this section can signifi cantly reduce the rail potential by nearly 50 V,and the combined through ground wire grounded only at both ends of the bridge and tunnel and adding a boosting cable can not only reduce the rail potential by about 40 V,but also have engineering economy.
作者
周栋
张威
雷佳华
Zhou Dong;Zhang Wei;Lei Jiahua
出处
《铁路通信信号工程技术》
2022年第S01期127-131,共5页
Railway Signalling & Communication Engineering
关键词
钢轨电位
桥隧区段
吸上线
贯通地线
rail potential
bridge and tunnel sections
boosting cable
combined through ground wire
