The effect of soil ionization on transient grounding electrode resistance in non-homogeneous soil conditions

2015 ◽  
Vol 26 (7) ◽  
pp. 1462-1475 ◽  
Author(s):  
Mehrdad Mokhtari ◽  
Zulkurnain Abdul-Malek ◽  
Zainal Salam
Keyword(s):  
Soil Conditions ◽  
Electrode Resistance ◽  
Homogeneous Soil ◽  
Grounding Electrode ◽  
Soil Ionization

The Effect of Grounding Electrode Parameters on Soil Ionization and Transient Grounding Resistance Using Electromagnetic Field Approach

2014 ◽  
Vol 554 ◽  
pp. 628-632 ◽  
Author(s):  
Mehrdad Mokhatri ◽  
Zulkurnain Abdul-Malek
Keyword(s):  
Electromagnetic Field ◽  
Electric Field ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Electrode System ◽  
Grounding Resistance ◽  
Field Approach ◽  
Electrode Resistance ◽  
Grounding Electrode ◽  
Soil Ionization

The soil ionization phenomenon occurs during the dispersion of lightning current into the earth. This phenomenon causes the grounding electrode resistance to be effectively reduced. The extension of the soil ionization depends on the current amplitude along the electrode and the resultant electric field intensity surrounding the electrode. The electrical and physical parameters of the grounding electrode system are found as factors that affect the electric field intensity. In this study the electromagnetic field approach and the soil breakdown theory are taken into account to investigate the effect of the mentioned factors on soil ionization and grounding resistance. Changing the parameters of the grounding electrode system affect the electric field distribution around the electrode. Based on the conditions the grounding electrode resistance was reduced between 12% to 75% by considering the soil ionization effect.

scholarly journals A critical review on soil ionisation modelling for grounding electrodes

2016 ◽  
Vol 65 (3) ◽  
pp. 449-461 ◽  
Author(s):  
Mehrdad Mokhtari ◽  
Zulkurnain Abdul-Malek ◽  
Gevork B. Gharehpetian
Keyword(s):  
Performance Analysis ◽  
Critical Review ◽  
Review Article ◽  
Comprehensive Review ◽  
Model Soil ◽  
Electrode Resistance ◽  
One Stop ◽  
Grounding Electrode ◽  
And Performance

Abstract Grounding electrode resistance non-linearly changes under impulse conditions due to soil ionisation phenomenon. Several models have been proposed to model soil ionisation for grounding electrodes applications. However, to date, there is yet an attempt made to compile all these works into a comprehensive review article. Therefore, this paper is written with the objective of summarizing all related works in this field as a one- stop reference. With reference to the literature, this paper is written to summarize the working principles of the soil ionisation models as well as the accuracy and performance analysis of the models. This paper, particularly highlights the deficiencies of the available models in terms of accuracy and performance. This knowledge will contribute to the development of a new accurate and efficient soil ionisation model.

scholarly journals Analysis on Behavior Grounding Electrode Resistance base on Profiling Method

2020 ◽  
Vol 864 ◽  
pp. 012159
Author(s):  
N. H. Hashim ◽  
S. N. M. Arshad ◽  
N. H. Halim ◽  
C. L. Wooi ◽  
AM Ariffen ◽  
...  
Keyword(s):  
Electrode Resistance ◽  
Grounding Electrode

Effect of thinning on growth and commodity structure of mixed stands of pine and spruce of wood-sorrel family type forests

10.12737/4504 ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 31-36
Author(s):  
Данилов ◽  
Dmitriy Danilov ◽  
Беляева ◽  
Nataliia Beliaeva ◽  
Ковалев ◽  
...  
Keyword(s):  
Family Type ◽  
Soil Conditions ◽  
Leningrad Region ◽  
Optimal Composition ◽  
Conifer Forest ◽  
Mixed Conifer ◽  
Forest Stands ◽  
Mixed Stands ◽  
Mixed Conifer Forest ◽  
Homogeneous Soil

The problems of joint cultivation of pine and fir, as well as the choice of the optimal composition of the target woods are examined. Collection of material for analysis of the commodity structure and forest indices of plantings was conducted in the summer of 2013 in Lisinsky teaching experimental forestry of Leningrad region in maturing stands of mixed conifer forest of sorrel type passed by thinning with intensity of 10 to 30 % in homogeneous soil conditions. Temporary sample plots measuring 0.25 hectares were laid by conventional forestry techniques considering OСT 56-69-83. Accounting of trees and calculation of the commodity structure of forest stands was conducted by conventional taxational methods.

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