Galerkin boundary element method for simulating lightning response of grounding grid in horizontal multilayered soil model considering soil ionization effect

IF 1.6 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC International Journal of Numerical Modelling-Electronic Networks Devices and Fields Pub Date : 2024-09-03 DOI:10.1002/jnm.3285

Zhong-Xin Li, Peng Li, Xia Zhao

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Abstract

This work proposes a novel mathematical model based on the Galerkin time-domain boundary element method for accurately calculating the lightning current distribution and lightning impulse response of the buried substation grounding grid, in a multi-layer horizontal layered soil model, by taking into account the soil ionization effect. To improve computational efficiency, the quasi-static complex image method and its closed form time-domain Green's function have been introduced into the model that has the ability to analytically calculate the mutual inductance coefficient between the branch currents of any two conductor segments and the mutual resistance coefficient between the leakage currents. The Galerkin time-domain boundary element method proposed in this work can simulate the transient lightning impulse response of a substation grounding grid buried in the multi-layer horizontal layered soil.

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考虑土壤电离效应的 Galerkin 边界元法模拟水平多层土壤模型中接地网的雷电响应

本研究提出了一种基于 Galerkin 时域边界元法的新型数学模型，通过考虑土壤电离效应，精确计算多层水平分层土壤模型中埋地变电站接地网的雷电流分布和雷电脉冲响应。为了提高计算效率，模型中引入了准静态复像法及其闭式时域格林函数，该方法能够分析计算任意两个导体段分支电流之间的互感系数和泄漏电流之间的互阻系数。本文提出的 Galerkin 时域边界元方法可以模拟埋设在多层水平分层土壤中的变电站接地网的瞬态雷电脉冲响应。

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来源期刊

International Journal of Numerical Modelling-Electronic Networks Devices and Fields 工程技术-工程：电子与电气

CiteScore

4.60

自引率

6.20%

发文量

101

审稿时长

>12 weeks

期刊介绍： Prediction through modelling forms the basis of engineering design. The computational power at the fingertips of the professional engineer is increasing enormously and techniques for computer simulation are changing rapidly. Engineers need models which relate to their design area and which are adaptable to new design concepts. They also need efficient and friendly ways of presenting, viewing and transmitting the data associated with their models. The International Journal of Numerical Modelling: Electronic Networks, Devices and Fields provides a communication vehicle for numerical modelling methods and data preparation methods associated with electrical and electronic circuits and fields. It concentrates on numerical modelling rather than abstract numerical mathematics. Contributions on numerical modelling will cover the entire subject of electrical and electronic engineering. They will range from electrical distribution networks to integrated circuits on VLSI design, and from static electric and magnetic fields through microwaves to optical design. They will also include the use of electrical networks as a modelling medium.