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Two-dimensional Transmission Line Modeling method: An algorithm considering non-homogeneous media and ionization

机译:二维传输线建模方法:考虑非均质介质和电离的算法

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摘要

This work presents a two-dimensional Transmission Line Modeling (TLM-2D) method for modeling non homogeneous media and non-linearities. The presented method is derived on top of the classical TLM-2D method with reactive and conductive stubs to modify the properties of the medium. Taking advantage of the analogy between electromagnetic and circuits theories, nonlinearities such as soil ionization, can be solved numerically through models formulated to represent electrical conductors, such as grounding systems. Using this analogy, the analysis can be extended more generically to non-homogenous and lossy media. Then, nonlinearity phenomena is included in the classical TLM-2D model through the dynamic variation of circuit parameters. This variation is obtained through the developed analytical based tests. Computational implementation details are also reported. A case study is presented considering a grounding grid mesh in non-homogeneous media submitted to lightning surges. Comparative test results with the state of the art highlight the improved precision of the presented solution.
机译:该工作提供了一种用于建模非均匀介质和非线性的二维传输线建模(TLM-2D)方法。所提出的方法是在经典TLM-2D方法的顶部导出,具有反应性和导电短管,以改变介质的性质。利用电磁和电路理论之间的类比,诸如土壤电离的非线性可以通过配制成代表电导体的模型来解决,例如接地系统。使用这种类比,分析可以更易于扩展到非同质和有损媒体。然后,通过电路参数的动态变化包括在经典TLM-2D模型中的非线性现象。通过开发的基于分析测试获得该变化。还报告了计算实施细节。考虑到在雷电浪涌的非均质介质中的接地网格网提出了一个案例研究。比较试验结果与现有技术突出了所提出的解决方案的改进精度。

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