Study on the influence of the transmission tower on the AC interference distribution on the surface of a buried steel pipeline under steady-state conditions

The application of the finite element method (FEM) to the analysis of AC interference between transmission lines and buried steel pipelines has been extensively studied in recent years. However, the related studies using the FEM have rarely considered the influence of the transmission towers on pipelines, and have not considered the specific distribution characteristics of interference parameters on the pipeline surface. Therefore, this paper uses the COMSOL Multiphysics software to establish a three-dimensional model of a typical corridor based on the FEM. The differences in AC interference on the pipeline surface with and without a tower are studied. Additionally, the effects of the pipe parameters on the pipeline surface current density distribution are analyzed. The results demonstrate that under transmission line steady-state conditions, the pipeline surface current density is often higher when there is a tower. Additionally, the current density distribution on the pipeline surface is not uniform, and the pipeline surface part facing the tower is subjected to the greatest AC interference. When determining the pipeline AC interference levels, the P-T spacing and pipe burial depth should be considered first. The research results providing useful reference for calculating the electromagnetic interference between transmission lines and pipelines using the FEM.

Automated summary

This paper uses FEM to establish a three-dimensional model of a typical corridor, and studies the influence of transmission towers on AC interference on the pipeline surface. The effects of pipe parameters on the pipeline surface current density distribution are also analyzed.