交流输电线路发生单相接地故障时会对“公共走廊”内的油气管道产生严重的交流干扰,危害人身安全、管道涂层及管道相关设备.因此,有效的缓解技术对于减小油气管道的交流干扰,保证人身安全和管道完整性具有重要的意义.以东营某油气管道为模型,对交流输电线路单相接地故障下油气管道交流干扰进行了系统的分析,提出了故障点处阻性耦合交流干扰的最佳缓解线长度计算公式;阻性耦合交流干扰的可缓解范围以及在可缓解范围内其他区域实施缓解时为达到与故障点处缓解相似的缓解效果所需缓解线长度的估算公式;提出综合缓解感性和阻性耦合交流干扰时应充分考虑两者之间的相位差.
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