直流输电接地极附近地下金属管道电流的分析

Analysis of Current on Underground Metallic Pipeline Near HVDC Ground Electrode

在应用矩阵法计算分析HVDC直线形接地极的地中电流场的基础上,采用金属管道的传输线型等值模型,分析了埋设于单层均匀土壤中的HVDC直线形接地极的地中电流对地下金属管道、电缆等的影响。着重探讨了管道走向、管道涂层、管道到接地极的距离等因素对管道所受腐蚀的影响,并得出若干相应的结论。

On the basis of computing the earth current fields of an HVDC linear ground electrode by the matrix method, applying the transmission-line type of epuivalent model of metallic pipelines, the effects of the earth current from an HVDC linear ground electrode buried in the homogeneous soil with single-layer structure on the underground metallic pipelines, cables etc. have been analysed. Especially the influences of some factors, such as pipeline's trend, coating, distance to the electrode etc. on the corrosion process of the pipelines are discussed in detail. As the results, some relevant conclusions are obtained.