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为了提高管道杂散电流腐蚀防护的针对性和有效性,使用Dymola仿真软件模拟燃气管道在轨道交通牵引电流干扰下的动态杂散电流分布情况。以土壤电位梯度作为判定指标,分析了轨道绝缘电阻存在均匀破损的情况下,机车行驶的一个周期内管道动态杂散电流的分布,探讨了不同绝缘接头安装位置、绝缘接头阻值大小以及不同牺牲阳极的安装位置、安装组数下,管道受到杂散电流的干扰情况,给出了安装绝缘接头和安装牺牲阳极两种杂散电流防护措施的最佳方式。
In order to improve the pertinence and effectiveness of the corrosion protection of stray current, Dymola simulation software was used to simulate the dynamic stray current distribution of gas pipelines under the disturbance of rail transit traction current. Taking the potential gradient of soil as the criterion, the distribution of dynamic stray current in one cycle of locomotive running under the condition of uniform damage of rail insulation resistance was analyzed. The location of different insulation joints, the size of insulation joint resistance, The installation location of the anode, the number of installation groups, the interference of the stray current by the pipeline, and the best way to install two kinds of stray current protection measures, such as installing the insulation joint and installing the sacrificial anode.