分布式杂散电流监测系统的数据通信研究

在分析轨道交通的杂散电流监测系统中各设备功能及其运行环境的基础上,本文选择了合理的网络拓扑结构,设计了完善的各个层次应用层网络协议,为系统实时性与无差错传输提供保障。

地铁杂散电流监测系统新型硫酸铜电极现场试验及测试结果分析

本文对地铁杂散电流监测系统中使用的硫酸铜电极作了简要介绍,特别对地铁2号线使用的新型长效免维护硫酸铜电极作了介绍,并对新型电极的现场试用情况及技术性能测试结果作了分析,供有关技术人员参考。

地铁车辆基地杂散电流腐蚀防护工程设计

城市轨道交通工程采用直流牵引供电系统,通过钢轨进行回流,鉴于走行轨不能完全绝缘于道床结构,因此存在杂散电流泄漏。杂散电流容易对土建结构钢筋以及设备金属外壳和地下金属管线产生腐蚀。车辆基地埋地管线、上盖物业开发相对集中,整体绝缘相对较差,因此,车辆基地是杂散电流防护的薄弱环节。目前,场段中为了减小杂散电流影响,采取了设置单向导通装置、分区回流、设置均流电缆减小回流电阻等措施,但杂散电流问题依然突出。本文以深圳九号线侨城东车辆段为例,提出杂散电流设计需遵循"以防为重点,以排为辅助,加强结合"的原则,除了做好常规轨道绝缘、加强回流通路等措施,还应设置收集网、排流柜,并加强监测。

Research on Integrated Monitoring and Prevention System for Stray Current in Metro

On the basis of analyzing the influencing factors and harmfulness of stray current, and discussing the existing problems of monitoring and prevention system for stray current, the integrated monitoring and prevention system for stray current in metro was developed. A net system of distributed computers for monitoring was set up. It can monitor the distribution of stray current in metro and the corrosion of the metal structure in the whole line. According to the situation of monitoring it can also control the drainage of its tank to reach the best effect and eliminate the negative effect of polarity drainage. By using the new type unilateral electric device, the problem of burning the rail by electric arc can be avoided. The unilateral electric device can be connected with the monitoring net system directly to realize the monitor in line and improve the reliability of the device.