城市轨道交通杂散电流在线监测与分析
杨国庆马学慧
On-line Monitoring and Analysis of Urban Rail Transit Stray Current
YANG GuoqingMA Xuehui
-
作者信息:天津城建大学控制与机械工程学院，300384，天津
-
Affiliation:School of Control and Mechanical Engineering, Tianjin Chengjian University, 300384, Tianjin, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2024.08.014
-
中图分类号/CLCN:U231.8
-
栏目/Col:研究报告
摘要:
［目的］为保障城市轨道交通附近埋地燃气管网的安全运行，减少城市轨道交通杂散电流对燃气管网的电化学腐蚀，需对城市轨道交通杂散电流进行在线监测与分析。［方法］获取天津某城市轨道交通区段附近埋地燃气钢质管道上设置的4个监测点的实时连续管地电位数据，并对其进行了时频域联合分析。建立了连续小波变换模型，并进行了小波功率谱分析。利用小波相干性分析，对管地电位信号间的相干程度及相位关系进行了研究。［结果及结论］城市轨道交通杂散电流干扰下管地电位信号是一种典型的非平稳信号，且存在一定的周期性波动规律；管地电位信号周期性波动强度随干扰源距离减小呈非线性增强，且周期性变化的管地电位波形整体呈类山峰状抛物线形，其中管地电位在64~128min时段内变化最为明显；城市轨道交通运行时信号间的相干性强度表现出明显的差异,且强相关性仅在某些时段出现，同时信号间相位的超前或滞后角度与城市轨道交通列车运行间隔相对应。
Abstracts:
［Objective］ To ensure the safe operation of underground gas pipeline network near URT (urban rail transit) and to mitigate the electrochemical corrosion on the gas pipeline network caused by URT stray current, it is necessary to conduct online monitoring and analysis of URT stray current. ［Method］ Real-time continuous pipe-ground potential data from four monitoring points set up on underground gas steel pipelines near a section of Tianjin URT are obtained. A combined time-frequency domain analysis is conducted on this data. A continuous wavelet transform model is established, and a wavelet power spectrum analysis is performed. Wavelet coherence analysis is utilized to study the coherence degree and phase relationship between pipe-ground potential signals. ［Result & Conclusion］ The pipe-ground potential signals under the interference of URT stray current are a typical non-stationary signal, with certain pattern of periodic fluctuations. The intensity of these periodic fluctuations increases non-linearly as the distance to the interference source decreases. The periodically changing pipe-ground potential presents an overall waveform of a mountain-shape parabolic curve, peaking most noticeably within the 64-128 minute range. During URT operation, the coherence intensity between signals shows significant variability, with strong coherence only appearing at some intervals. Additionally, the leading or lagging angles of the inter-signal phase correspond to the operation intervals of URT trains.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 碳纤维地铁列车的商用将开启轨道车辆用材的新时代
过刊浏览
资料下载
友情链接