Finite-difference modeling of dispersive soils validated via experimental evaluation of transient grounding signals

被引：6
作者：
de Oliveira, Rodrigo M. S. [1 ]
Fujiyoshi, Daiyuki M. [1 ]
Araujo, Ramon C. F. [1 ]
do Nascimento, Julio A. S. [2 ]
Carvalho, Lorena F. P. [1 ]
机构：
[1] Fed Univ Para UFPA, Inst Technol ITEC, BR-66073900 Belem, Para, Brazil
[2] Eletrobras Eletronorte Technol Ctr Miramar, BR-66073900 Belem, Para, Brazil
来源：
JOURNAL OF ELECTROSTATICS | 2017年 / 87卷
关键词：
Finite-Difference Time-Domain (FDTD); Dispersive soil modeling; Design of surge generator; Transient analysis of grounding systems; ELECTRODES;
D O I：
10.1016/j.elstat.2017.06.001
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：
In this paper, we develop a soil dispersion model into the FDTD algorithm for analyzing grounding systems. The model is constructed by inserting into frequency-domain Maxwell-Ampere equation a Pade approximant for sigma + j omega epsilon, in such way functions available in literature describing the frequency dependence of soil's parameters are properly represented. With adequate mathematical manipulations, time-domain equations for uptating electric field are obtained. The second contribution of this paper is the design and construction of a low-cost surge generator, which is used in the experiments as the voltage excitation source. The results show that the simulated signals are in excellent accordance with measurements. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：263 / 275
页数：13
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