针对交流供电系统通过空间的电磁耦合和大地的阻性耦合对邻近埋地管道产生交流干扰的问题，以广州地铁22号线为例，研究使用缠绕锌带来抑制管道交流干扰的方法，搭建交流地铁线路与油气管道及锌带的仿真模型，计算管道敷设锌带前后电磁感应电压、地耦合电位和涂层耐受电压，研究锌带对交流干扰的防治效果，并且通过对锌带的腐蚀量计算，对其在交流干扰下的运行寿命进行分析。研究结果表明：交流杂散电流腐蚀能力较弱，交流干扰对于锌带的腐蚀量仅为每年0.3%；敷设锌带后的管道交流电流密度降幅可达87.2%，锌带对于管道交流干扰的抑制效果显著。

With the rapid development of the economy, China’s urban subway network has become more widely distributed. Owing to their limitations, traditional DC power supply systems are increasingly unable to meet existing and future needs. Therefore, AC power supply systems will be used in some urban express lines, such as Guangzhou Metro 22. The power supply system produces AC interference with adjacent buried pipelines through the electromagnetic coupling of space and resistive coupling of the earth. In engineering, winding zinc tape is often used to suppress the AC interference of pipelines. In this study, a simulation model of an AC metro line, oil and gas pipeline, and zinc strip was built, and the electromagnetic induction voltage, ground coupling potential, and coating withstand voltage before and after laying the zinc strip were calculated. The prevention effect of the zinc strip on AC interference was studied, and the operation life-span under AC interference was analyzed by calculating the corrosion of the zinc strip. The corrosion ability of the AC stray current was found to be relatively weak, the corrosion amount of AC interference to the zinc strip was only 0.3% per year, and the AC current density of the pipeline after the zinc tape was laid was reduced by 87.2%, revealing that the zinc tape has a significant suppression effect on the AC interference of the pipeline.

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