Modeling of Electromagnetic Wave Coupling to Thin-Wire Structures in Terrain Environments Using Hybrid PE/TPIE Method

Dongmin Zhang,Ju Feng,Xiaochuan Deng,Youfeng Cheng,Cheng Liao

doi:10.1155/2019/2839630

Dongmin Zhang, Ju Feng + Show 3 more

Open Access

https://doi.org/10.1155/2019/2839630

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Abstract

Analysis of electromagnetic wave coupling to thin-wire structures plays a very important role in electromagnetic compatibility (EMC). In this paper, a hybrid method, which is integrated parabolic equation (PE) and two-potential integral equation (TPIE), is presented to analyze the coupling problems in terrain environments. To model the realistic scenarios, PE based on the split-step Fourier transform (SSFT) technique is applied to solve the three-dimensional field distribution to obtain the external excitations for the wires. According to the boundary conditions, the high-precision TPIE solved via the moment method (MoM) is developed to simulate the induced currents on the wires. The hybrid method takes the terrain influences into account and provides a more reasonable result compared to the traditional approaches. Numerical examples are given to demonstrate correctness of the proposed method. Simulation experiments of field-to-transmission lines with different frequencies, radiation source heights, conductor radii, and lengths, in a realistic scenario constructed by a digital map, are carried out to investigate the coupling properties.

Highlights

Conducting wire structures are common in power facilities and communication systems, such as the aerial power lines, communications cables, and wire antennas
This section begins with numerical experiments to validate the hybrid method compared with full-wave method, followed by simulations to illustrate the accuracy of parabolic equation (PE) model in calculating irregular terrain wave propagation
The currents vary with transmitter frequency when the conductor lengths and spatial locations are fixed, because of the different sensitivity and coupling ability of electromagnetic waves acting on lines

Summary

Introduction

Conducting wire structures are common in power facilities and communication systems, such as the aerial power lines, communications cables, and wire antennas. High-precision numerical methods [4, 5] and efficient approximate circuit approaches [3, 6, 7] have been developed to analyze the coupling problems of thin-wires, where the ground is regarded as an infinite plane for simplifying the model to be solved. A hybrid PE/TPIE method is presented to model electromagnetic wave coupling to thin-wire structures in terrain environments.

Theory and Formulations

Results and Discussion

Conclusions