Influence of Soil Structure On Coating Voltage of Buried Pipeline When Lightning Strikes Transmission Lines

Transmission lines and buried oil and gas pipelines are very similar in the principle of selecting paths, the situation that transmission lines and buried oil and gas pipelines are parallel for a long distance or intersected occurs constantly. When the transmission line is struck by lightning, the safety of buried oil and gas pipelines will be threatened. In this paper, CDEGS is used to study the influence of uniform soil, horizontal stratified soil and vertical stratified soil on the pipeline induced voltage when the buried oil and gas pipeline is parallel to the transmission line. It can be seen from the study that the maximum coating voltage along the pipeline is mainly related to the soil resistivity around the ground device of the tower struck by lightning. In the design stage of the pipeline and transmission line, the field investigation should be done and the transmission line should be arranged on the side with low soil resistivity.