A Computational Improvement in Grounding Systems Transient Analysis

被引：6

作者：

Lima, Antonio C. S. ^{[1
]}

Moura, Rodolfo A. R. ^{[2
]}

Vieira, Pedro Henrique N. ^{[2
]}

Schroeder, Marco Aurelio O. ^{[2
]}

Correia de Barros, Maria Teresa ^{[3
]}

机构：

[1] Univ Fed Rio de Janeiro, COPPE UFRJ, BR-68504 Rio De Janeiro, Brazil

[2] Univ Fed Sao Joao del Rei, BR-36307352 Sao Joao Del Rei, Brazil

[3] Univ Lisbon, Inst Super T6cn, P-1049001 Lisbon, Portugal

来源：

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY | 2020年 / 62卷 / 03期

关键词：

Conductors; Electrodes; Impedance; Grounding; Soil; Surface impedance; Method of moments; Bonding and grounding; computational electromagnetics; method of moments (MoM); numerical methods and modeling; transmission line analysis and testing; LIGHTNING-INDUCED VOLTAGES; ELECTROMAGNETIC TRANSIENTS; INTEGRAL-EQUATION; CIRCUIT MODELS; PARAMETERS; SIMULATION; LINES;

D O I：

10.1109/TEMC.2019.2918621

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This study investigates the adequacy of a modification in the evaluation of transversal and longitudinal impedance matrices for wideband modeling of grounding electrodes without a significant loss of accuracy. It is based on an approximation of the so-called hybrid electromagnetic model (HEM) and is called modified-HEM (MHEM). It exploits the average distance between segmented electrodes, allowing to pre-calculate the integral prior to the evaluation of the frequency loop improving considerably its numerical performance. Apart from some discrepancies for frequencies above a few MHz, the results for the harmonic impedance presented a very good accuracy when compared with the ones obtained using HEM. A comparison with an experimental test is carried out to enforce the adequacy of the investigated formulation within suitable parameters.

引用

页码：765 / 773

页数：9

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