Numerical Simulation of the Negative Downward Leader Current With the Associated Far-EM Field Generated by Lightning

Lakhdar, Asmaa

doi:10.1109/temc.2024.3352509

Cited by 2 publications

(2 citation statements)

References 40 publications

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“…By substituting the general expression s 1 into the vector potential in Equation (12), it is also possible to acquire the vector potential's vertical component, as denoted in Equation (17). Equation (18) expresses the magnetic field "B ( → b )" and the electric field "E ( → e )".…”

Section: Rusck Formulationmentioning

confidence: 99%

“…Farhan Mahmood carried out insulation work to protect against lightning-induced overvoltages in medium-voltage overhead lines [11]. In a similar literature study, a numerical analysis of both the lightning current pulse and the electromagnetic field propagating in the far field was performed using a revised modified transmission line model with exponential decay (MTLE) for high-rise buildings with conductive ground [12]. In another work, theoretical models, numerical simulations and experimental tests for determining the pulses propagating between the windings of transformers subjected to lightning strikes were discussed [13].…”

Section: Introductionmentioning

confidence: 99%

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The Indirect Effect of Lightning Electromagnetic Pulses on Electrostatic, Electromagnetic Fields and Induced Voltages in Overhead Energy Transmission Lines

Cakil,

Carlak,

Ozen

2024

Applied Sciences

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The impact of a lightning electromagnetic pulse (LEMP) on a power line or power station produces an effect similar to that of switching between a significant power source and a power line circuit. This switch closure causes a sudden change in routing conditions, creating a transient state. This situation has been studied in terms of electrostatic and electromagnetic induction, as well as overvoltage changes. Appropriate mathematical models were used to analyze these changes. While vertical electric field analysis has been carried out in a few studies, magnetic field and horizontal electric field vectors have not been studied. In this study, the Rusck formulation and the Heidler current formulation are combined at the current level, developed and analyzed. This is because the Rusck expression can sometimes give incorrect results at the current level. Also, in the analysis, electromagnetic field formulations based on accelerating charges are used instead of the dipole approximation to eliminate the need for interpolation in the graphical results. In contrast to other studies in the literature, this study proposes the use of moving and accelerating load techniques to better understand the effects of LEMPs on power transmission lines. Also, in this study, the double exponential problem of the current form in Rusck’s formulation is addressed in order to obtain a close approximation of the physical form of the LEMP. Additionally, the field–line (coupling) relationship is studied according to a unique closed formulation, leading to important determinations about the overvoltages generated on a line depending on the propagation speed of the LEMP sprout and the electrical changes in the area where the LEMP first occurs.

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Section: Rusck Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Indirect Effect of Lightning Electromagnetic Pulses on Electrostatic, Electromagnetic Fields and Induced Voltages in Overhead Energy Transmission Lines

Cakil,

Carlak,

Ozen

2024

Applied Sciences

View full text Add to dashboard Cite

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Combined Wind Turbine Protection System

Kaverin,

Nurmaganbetova,

et al. 2024

Energies

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The increasing deployment of wind turbines in technologically advanced nations underscores the need to enhance their reliability, extend their operational lifespan, and minimize failures. The current protection devices for wind turbine components do not sufficiently shield them from various external factors that degrade performance. This study addresses the environmental and technical challenges that disrupt wind turbine operations and reviews existing research and technical solutions for protecting individual components, supported by experimental findings. Using a decomposition method followed by the integration of protection components, we propose a combined protection system designed to improve the overall resilience of wind turbines. The proposed system aims to reduce incidents, extend service life, and increase reliability, addressing a critical gap in wind energy technology and contributing to its continued development and efficiency.

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Numerical Simulation of the Negative Downward Leader Current With the Associated Far-EM Field Generated by Lightning

Cited by 2 publications

References 40 publications

The Indirect Effect of Lightning Electromagnetic Pulses on Electrostatic, Electromagnetic Fields and Induced Voltages in Overhead Energy Transmission Lines

The Indirect Effect of Lightning Electromagnetic Pulses on Electrostatic, Electromagnetic Fields and Induced Voltages in Overhead Energy Transmission Lines

Combined Wind Turbine Protection System

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