Results 1 to 10 of about 33,091 (257)

Performance of Grounding Electrodes Under Lightning Strokes in Uniform and Two-Layer Soils Considering Soil Ionization

open access: yesIEEE Access, 2022
This article presented the characteristics of the grounding electrodes in uniform and two layer soils when subjected to lightning including the impacts of soil ionization with frequency, soil resistivity, and permittivity variations.
Osama E. Gouda   +4 more
doaj   +4 more sources

GPR of Multiple Vertical Rods under Lightning Strokes Considering Ionization, Dispersion, and Non-Homogeneity of Lossy Soils [PDF]

open access: yesAUT Journal of Electrical Engineering, 2023
In this paper, the effects of ionization and dispersion of a lossy soil on the Grounding Potential Rise (GPR) of buried multiple vertical rods under lightning return strokes are simultaneously studied. In all studies, an efficient modeling method, called
Saeed Reza Ostadzadeh   +2 more
doaj   +1 more source

Investigations on the Performance of Various Horizontal Ground Electrodes

open access: yesEnergies, 2021
Experimental work on grounding systems has shown that the characteristics of grounding systems under high impulse conditions are different than those obtained at steady-state conditions.
Hanis Hamizah Hizamul-Din   +4 more
doaj   +1 more source

Overview of Transient Simulations of Grounding Systems under Surge Conditions

open access: yesEnergies, 2022
The present paper gives an overview of modelling methods of standard grounding systems under surge conditions, using the non-uniform transmission line approach.
Tomasz Kisielewicz, Milton Cuenca
doaj   +1 more source

Studying Direct Lightning Stroke Impact on Human Safety Near HVTL Towers Considering Two Layer Soils and Ionization Influence

open access: yesIEEE Access, 2023
A lightning strike is considered one of the most risky natural phenomena that can lead to human harmful and the surrounding soil layers. To tackle this issue, this article investigates the influence of direct lightning characteristics in terms of human ...
Osama E. Gouda   +4 more
doaj   +1 more source

Comprehensive Modeling of Transient Analysis of Grounding System under Lightning Surges [PDF]

open access: yesمجله مدل سازی در مهندسی, 2019
During lightning discharge, the transient performance of grounding system is influenced by the time-dependent nonlinear behavior related to soil ionization and frequency dependence of soil electrical parameters related to high-frequency spectrum of ...
Jalil Ghayur safar, Reza Shariatinasab
doaj   +1 more source

Expanding Molecular Coverage in Mass Spectrometry Imaging of Microbial Systems Using Metal-Assisted Laser Desorption/Ionization

open access: yesMicrobiology Spectrum, 2021
Mass spectrometry imaging (MSI) is becoming an increasingly popular analytical technique to investigate microbial systems. However, differences in the ionization efficiencies of distinct MSI methods lead to biases in terms of what types and classes of ...
Jessica K. Lukowski   +6 more
doaj   +1 more source

Analysis of soil impulse discharge characteristics based on optical‐electrical synchronous observation

open access: yesIET Generation, Transmission & Distribution, 2022
The impulse performance of grounding electrodes highly depends on soil impulse discharge characteristics. The analysis of soil discharge dynamic process images is helpful to understand the impulse discharge mechanism of grounding electrodes.
Yuanjie Li   +7 more
doaj   +1 more source

Distribution of uranium, thorium, and isotopic composition of uranium in soil samples of south Serbia: Evidence of depleted uranium [PDF]

open access: yesNuclear Technology and Radiation Protection, 2004
Inductively coupled plasma mass spectrometry and thermal ionization mass spectrom - etry were used to measure concentration of uranium and thorium as well as isotopic composition of uranium respectively in soil samples collected around south Serbia.
Sahoo Sarata Kumar   +4 more
doaj   +1 more source

Grounding System Modeling and Evaluation Using Integrated Circuit Based Fast Relaxed Vector Fitting Approach, Considering Soil Ionization

open access: yesApplied Sciences, 2020
Since high voltage transmission line towers or wind turbines structures are installed in high-altitude areas, it is essential to achieve a high overvoltage protection system against direct and indirect lightning strikes collisions.
Maziyar Fakhraei   +2 more
doaj   +1 more source

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