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首页> 外文期刊>The European physical journal. Applied physics >Electromagnetic field model for the numerical computation of voltages induced on buried pipelines by high voltage overhead power lines
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Electromagnetic field model for the numerical computation of voltages induced on buried pipelines by high voltage overhead power lines

机译：电磁场模型，用于高压架空输电线在地下管道上感应产生的电压的数值计算

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摘要

This paper proposes an innovative, generally applicable numerical model for the calculation of the three-dimensional (3D) electromagnetic field generated by high voltage (HV) overhead power transmission lines (OHL) on the buried metallic structures (e.g., pipeline networks). The numerical analysis is based on a coupled finite element-boundary element model (FEM-BEM) designed to calculate the induced potential on buried pipelines for complex geometrical structures of HV OHL networks working on normal or fault conditions. The one-dimensional (1D) FEM technique based on pipe elements is used to discretize the mathematical model that describes the interior of the pipe and is coupled with the mathematical model that describes the exterior of the pipe using 3D-BEM integral equations. The full electromagnetic field model gives the flexibility to calculate the potential distribution in any point of the soil, providing useful information for the step and touching voltages. The computation accuracy of the numerical algorithm implemented is verified through two test problems by comparing the numerical results with those obtained using a software package based on the Transmission Line Method (TLM) and CIGRE formulae. Last part of the paper presents calculations of the induced potential on buried pipeline in the vicinity of a complex HV OHL working on normal and fault condition. The influence of the currents' direction and magnitude flowing on the HV OHL on the induced pipeline potential distribution is analyzed.
机译：本文提出了一种创新的，通用的数值模型，用于计算由埋入金属结构（例如，管道网络）上的高压（HV）架空输电线路（OHL）产生的三维（3D）电磁场。数值分析基于耦合有限元边界元模型（FEM-BEM），该模型旨在计算在正常或故障条件下工作的HV OHL网络的复杂几何结构在地下管道上的感应电势。基于管道元素的一维（1D）FEM技术用于离散描述管道内部的数学模型，并与使用3D-BEM积分方程描述管道外部的数学模型结合。完整的电磁场模型可灵活地计算土壤任何一点上的电势分布，为阶跃电压和接触电压提供有用的信息。通过将数值结果与使用基于传输线法（TLM）和CIGRE公式的软件包获得的数值结果进行比较，通过两个测试问题验证了所实施数值算法的计算精度。本文的最后一部分介绍了在正常和故障条件下工作的复杂HV OHL附近埋地管道上的感应电势的计算。分析了电流方向和大小对高压OHL的影响，对感应管道电位分布的影响。

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