Induced Voltages on Overhead Line by Return Strokes to Grounded Wind Tower Considering Horizontally Stratified Ground

Rizk, Mohammad E. M.; Mahmood, Farhan; Lehtonen, Matti; Badran, Ebrahim A.; Abdel-Rahman, Mansour H.

doi:10.1109/temc.2016.2588000

Cited by 13 publications

(2 citation statements)

References 53 publications

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“…Earth electrical parameters due to sudden overvoltage caused by the lightning strikes can be affected by frequency dependence. However, the earth conductivity and relative permeability should be taken into account to accurately simulate the performance of grounding systems [12][13]. The turbine electrical system design presents a few grounding matters, which are not similar to other electrical systems.…”

Section: Modeling Of Grounding Systemmentioning

confidence: 99%

A Comparative simulation on the grounding grid system of a wind turbine with FEA software

Balci

Helvaci

2019

Journal of Energy Systems

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The mathematical models proposed in the literature are used to determine the grounding resistance value for electrical installations. These models are mathematical expressions that change according to grounding type and the mechanical properties of the grounding system elements. Besides, the inclusion of nonlinear terms is another important issue in the modeling studies. For the modeling of nonlinear systems and the analysis of the faults that may occur, the finite element analysis (FEA) approach provides realistic results. In the present study, the simulation of a grid fault that may occur in the grounding system of a sample wind turbine (WT) is modeled by 2D electrostatic solver in FEA software. The simulation results prove that the findings are similar to the realistic faults in the grounding system.

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Section: Modeling Of Grounding Systemmentioning

confidence: 99%

A Comparative simulation on the grounding grid system of a wind turbine with FEA software

Balci

Helvaci

2019

Journal of Energy Systems

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“…The influence of soil inhomogeneity, in terms of both horizontal and vertical stratification of the ground, on lightning electromagnetic fields has been intensively investigated within the last few years, where the results exhibit such an influence to be quite significant [12]- [20]. In fact, not only soil inhomogeneity but also the phenomenon of soil ionization affects, in particular, the lightning response of GSs.…”

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confidence: 99%

Performance of Large-Scale Grounding Systems in Thermal Power Plants Against Lightning Strikes to Nearby Transmission Towers

Rizk

Lehtonen

Baba

et al. 2019

IEEE Trans. Electromagn. Compat.

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In spite of the contemporary interest in renewable power plants, thermal power plants are still inevitable. Various electric equipment and apparatus are grounded via a large-scale grounding system in thermal power plants. In this paper, the three-dimensional finite-difference time-domain method has been employed to study the performance of such a large-scale grounding system against a lightning strike to a nearby transmission tower. The study has emphasized how a nearby sea, which is utilized for cooling purposes in thermal power plants, influences the ground potential rise on the large-scale grounding system considering soil ionization. The results show that the distribution of the ground potential rise on the large-scale grounding system is quite dependent on the alignment of sea with the large-scale grounding system. In addition, the extent that soil ionization affects the ground potential rise is dependent on the distance between the struck tower and the large-scale grounding system. Index Terms-Electromagnetic fields, finite-difference timedomain (FDTD) method, grounding systems (GSs), lightning strikes. I. INTRODUCTION T HE GLOBAL interest in renewable energy is currently increasing due to environmental considerations. However, the majority of the contemporaneous electric energy consumed all over the world is actually produced from thermal power plants owing to the intermittent nature of renewable resources and their associated technical challenges [1]. Power system apparatus, equipment, and electric circuits inside a thermal power plant are grounded by a large-scale grounding system (LSGS) to protect them against power system electromagnetic transients such as lightning and switching surges. Therefore, a considerable research has been devoted to study grounding systems Manuscript

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The effect of the inclined lightning channel on electromagnetic fields and the induced voltages on overhead lines

Nematollahi

Vahidi

2021

Electr Eng

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Induced Voltages on Overhead Line by Return Strokes to Grounded Wind Tower Considering Horizontally Stratified Ground

Cited by 13 publications

References 53 publications

A Comparative simulation on the grounding grid system of a wind turbine with FEA software

A Comparative simulation on the grounding grid system of a wind turbine with FEA software

Performance of Large-Scale Grounding Systems in Thermal Power Plants Against Lightning Strikes to Nearby Transmission Towers

The effect of the inclined lightning channel on electromagnetic fields and the induced voltages on overhead lines

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