Electromagnetic Interference Evaluation and Mitigation between Railways and Nearby Power Lines

铁路在加拿大承担着相当大的客运和货运量。铁路轨道作为信号线路，确保铁路交通的安全和正常，信号故障可能导致铁路运输中断、货物和铁路基础设施损坏、人员伤亡。电力线通常与铁路共用一条走廊。铁路和附近电力线之间的电磁干扰主要有两个问题：人员安全和信号系统兼容性。本研究的目的是寻找一种有效的方法，以减少电力线干扰对铁路的不利影响，实现其兼容和可靠的运行。到目前为止，在这一领域进行的研究非常有限，加拿大标准协会（CSA）标准中也没有很好地涵盖铁路干扰。通过与马尼托巴水电公司合作，本研究将创建一个快速评估工具，用于在线路路线规划阶段确定不同类型输电线路结构的输电线路与铁路之间的最小间隔距离，以有效减轻干扰影响。马尼托巴水电公司将实施研究成果，指导输电线路设计工程师适当考虑电力线路和铁路之间的干扰。研究结果将通过马尼托巴水电公司与CSA工作组和加拿大的铁路公司分享，以便他们准备即将到来的新监管要求，并对CSA架空线路设计标准进行修改。

Railways carry considerable passenger and cargo traffic in Canada. Railway tracks serve as signalling circuits to ensure safety and regularity in rail traffic, and a signalling failure may result in interruption of the railway transport, damage of cargo and railway infrastructure, injuries or losses of human life. Power lines often share a common corridor with railways. Electromagnetic interference between railways and nearby power lines pose two main concerns: personnel safety and signal-system compatibility. The purpose of this proposed research is to find an effective approach to reduce adverse influence of power lines' interference on railways and achieve their compatible and reliable operation. To date, very limited research has been conducted in this area, and the railway interference is not well covered in the Canadian Standards Association (CSA) standard. By working with Manitoba Hydro, this research will create a quick assessment tool for determination of a minimum separation distance between transmission lines and railways for different types of transmission line structures at the line route planning stage in order to effectively mitigate the interference effect. Manitoba Hydro will implement the research results to guide transmission line design engineers to properly consider interference between power lines and railways. The research findings will be shared with the CSA working group and the railway companies in Canada through Manitoba Hydro in order for them to prepare upcoming new regulatory requirements and make changes of the CSA standard on the overhead line design.