为了有效分析永唐秦输气管道受实际交流干扰状况以及排流缓解效果是否满足现行标准的腐蚀限值和安全要求,通过现场测试、数值模拟等方法,测试了永唐秦输气管道不同位置处电流密度、腐蚀速率等参数,分析了不同干扰因素对管道交流干扰的影响规律,基于实际管道分布位置及参数、高压输电线路参数等基础数据,建立符合现场实际的交流干扰模型并研究了高压交流输电线路对埋地管道产生的干扰。结果表明:交流干扰模型与现场实际具有良好的一致性,可以有效模拟管道受交流干扰状况,管道沿线交流干扰程度均处于可接受范围内,排流效果较好。研究成果可为后续在役管道排流设施效果检验及新建管道交流干扰防护设计提供借鉴。

To thoroughly assess the actual AC interference on the Yong-Tang-Qin (Yongqing-Tangshan-Qinhuangdao) Gas Transmission Pipeline and determine whether the grounding mitigation aligns with corrosion limits and safety standards, field tests and numerical simulations were conducted. These evaluations measured current density, corrosion rate, and other parameters at various points along the Yong-Tang-Qin Gas Transmission Pipeline. Additionally, the impacts of different interference factors on the pipeline‘s AC interference were analyzed. Utilizing the actual pipeline location distribution and parameters and data such as parameters of high-voltage transmission lines, an AC interference model was developed that accurately reflects on-site conditions. This model aimed to analyze the effects of high-voltage AC transmission lines on buried pipelines. The results show that the AC interference model corresponds well with the actual site observations, and effectively mirrors the pipelines AC interference scenario. The AC interference levels throughout the pipeline remain within permissible limits, indicating a successful grounding process. This paper can serve as a guideline for future evaluations of the effectiveness of operating pipeline grounding systems and the design of AC interference protection for newly constructed pipelines.