Analysis of lightning induced effects on buried pipeline due to direct strike on ground

摘要

Damages of buried energy pipeline due to direct Lightning strikes on ground has recently appeared substantially noticeable. This paper presents comprehensive study of damages on energy pipelines buried under homogeneous soil due to direct strike on ground overear the pipeline. The induced voltage on pipeline is analysed using electromagnetic analysis approach. A model was developed to simulate a portion of a pipeline system under varying ground, geometry and lightning parameters, like, lightning current amplitude, rise time, ground resistivity and permittivity, burial depth, and distance of strike point to the buried pipeline. The result showed that induced effect greatly depend on soil electromagnetic parameters and also to strike locations. This paper also presents mutual relationship among horizontal magnetic field and induced current, along with the effect of lightning stroke location and distance from the buried pipeline on the induced disturbances.