某原油管道同时与高压交流输电线路和电气化铁路相邻且并行，采用数据记录仪对管道沿线的交流电压和交流电流密度进行24 h监测，研究了管道受干扰程度和干扰规律，并利用数值模拟技术计算干扰严重管段的干扰防护措施。结果表明：管道受到电气化铁路和高压交流输电线路的混合交流干扰，交流电压达到44.48 V，交流电流密度达到1 248.66 A/m²，超过标准规定的限值；当管道主要受输电线路或电气化铁路的干扰时，交流电压峰值主要出现在干扰源路径与管道路径关系发生变化的位置；在混合干扰情况下，电气化铁路与输电线路造成的干扰叠加，对管道交流电压的干扰及干扰幅度无规律；在管道沿线设置9处交流排流点共1 220 m锌带，可将管道的交流干扰程度降低至标准规定的限值以下。

A crude oil pipeline is adjacent and parallel to a high-voltage AC transmission line and a electrified railway at the same time. In order to study the degree and rules of AC interference to pipeline, the AC voltages and AC current densities along the pipeline were monitored for 24 hours through a data logger. And numerical simulation technology was used to calculate interference protection measures for severely interfered pipeline sections. The results show that the pipeline was interfered by a mixture of the electrified railway and the high-voltage AC transmission line. The AC voltage reached 44.48 V and the AC current density reached 1 248.66 A/m², exceeding the limits specified in the standard. When the pipeline was interfered mainly by the transmission line or the electrified railway, the peak values of the AC voltage mainly appeared where the relationship between the interference source route and the pipeline route changed. In the case of mixed interference, the interference of electrified railway and transmission line was superposed, and the interference of AC voltage and amplitude of interference were disordered. Installing a total of 1 220 m of zinc-belts at 9 AC discharge points along the pipeline could reduce the AC interference level of the pipeline to below the limits specified by the standard.