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
收藏
页码：765 / 773
页数：9
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