基于地表电位梯度的地铁杂散电流动态干扰范围评估模型  

Evaluation model for dynamic interference of subway stray current based on surface potential gradient

作　　者：王禹桥[1] 黄玉坚 彭成宽 李威[1] 王承涛[1] WANG Yuqiao;HUANG Yujian;PENG Chengkuan;LI Wei;WANG Chengtao(School of Mechatronic Engineering,China University of Miningand Technology,Xuzhou Jiangsu 221116,China;Foshan Railway Investment Construction GroupCo.,Ltd.,Foshan Guangdong 528000,China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]佛山市铁路投资建设集团有限公司,广东佛山528000

出　　处：《北京交通大学学报》2020年第3期30-36,共7页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(51607178)。

摘　　要：地铁系统在中国城镇化建设过程中日益迅猛发展,其中的杂散电流腐蚀问题在保证系统安全可靠运行的过程中不容忽视.在杂散电流电阻网络模型和电流场分布公式的基础上,提出基于地表电位梯度的地铁杂散电流动态干扰范围评估模型,在模型中考虑了由于机车运行状态不同导致牵引电流的差异.使用现场测量的机车牵引电流变化曲线对模型进行了算例分析,并研究了过渡电阻对于电位梯度分布的影响规律.该模型能够根据国标GB/T 19285-2003中所规定的电位梯度阈值,进行考虑机车运行状态下的杂散电流干扰范围评估,并为地铁附近管线建设选址、腐蚀防护提供有效参考.The subway system is developing gradually in the process of urbanization in China. The problem of stray current corrosion cannot be ignored for ensuring the safe and reliable operation of the system. According to the stray current resistance network model and the current field distribution formula, and evaluation model for the dynamic interference induced by stray current based on the surface potential gradient is proposed. In this model, the different in traction current due to different operation mode of the locomotive is considered. The model of the locomotive traction current measured on site is utilized to analyze the model, and the sensitivity analysis of the transition resistance on the potential gradient distribution is studied. The proposed model can be employed to evaluate the range of stray current interference according to the threshold specified in GB/T 19285-2003, and provide an effective reference for the reasonable site election and corrosion protection of buried pipeline near the subway.

关 键 词：杂散电流 干扰范围 埋地管线 电位梯度 

分 类 号：U231[交通运输工程—道路与铁道工程]