| In this thesis, aiming at the electromagnetic interference effect from power lines to nearby underground metallic pipelines, and supported by Gansu electric power design institute, a method is introduced to calculate the steady interference effect in underground metallic pipelines. Based on finite difference-time domain method, an improved method is proposed to calculate transient electromagnetic interference in underground metallic pipelines due to a fault in nearby power lines. Furthermore, a parametric analysis is performed to show how the electromagnetic interference is affected by varying various parameters and provides insight on how to control the electromagnetic interference. Finally, an engineering example is analyzed by the proposed method and compared with the relative criteria.
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