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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:考虑非均匀介质和电离的算法

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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:这项工作提出了一种二维传输线建模(TLM-2D)方法,用于对非均匀介质和非线性进行建模。提出的方法是在经典TLM-2D方法的基础上派生而来的,该方法带有电抗性和导电性短管以修改介质的特性。利用电磁理论和电路理论之间的类比,可以通过公式化表示电导体的模型(例如接地系统)以数字方式解决非线性问题(例如土壤电离)。使用这种类比,可以将分析更广泛地扩展到非均质和有损介质。然后,通过电路参数的动态变化将非线性现象包括在经典TLM-2D模型中。这种差异是通过开发的基于分析的测试获得的。还报告了计算实现的详细信息。提出了一个案例研究,其中考虑了在非均匀介质中遭受雷电冲击的接地网格。与最新技术水平的比较测试结果突显了所提出解决方案的改进精度。

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