构建海底电缆对沉海油气管道交流干扰的计算模型，模拟计算了海底电缆常态运行下负载电流不平衡度、海底电缆与管道的间距、铠装外被层面电阻率以及接地方式对管道所受交流干扰的影响。结果表明：随着负载电流不平衡度和海底电缆外被层面电阻率的增大、海底电缆与管道间距减小，管道的交流干扰电压及交流电流密度均增大；且同一负载电流不平衡度下，管道受干扰的程度亦随负载电流分配方式的不同呈现出差异性；当海底电缆由三相互连接地转变成三相分别接地时，管道的最大交流干扰电压增大了将近6倍。

A calculation model of AC interference from submarine cables to submerged oil and gas pipelines was constructed. The effects of load current imbalance, distance between submarine cables and pipelines, resistivity of armored outer layer and grounding mode on AC interference to pipelines under normal operation were investigated by simulation.The results show that with the increase of load current imbalance and resistivity of submarine cable outer layer and the decrease of distance between submarine cable and pipeline, AC interference voltage and AC current density of pipeline increased. And under the same load current imbalance, the interference degree of the pipeline was different with the load current distribution method. When the grounding mode of submarine cable was switched from three connected to three separately grounded, the maximum interference voltage of the pipeline was increased by nearly six times.