A Correction to Rusck Expression for the Evaluation of Lightning-Induced Overvoltages for High-Resistivity Ground

Ain, Noor Ul; Andreotti, Amedeo; Mahmood, Farhan; Rizk, Mohammad E. M.

doi:10.1109/temc.2023.3281883

Cited by 2 publications

(1 citation statement)

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“…In another work in the literature, a new numerical method was proposed to reconstruct the waveform of a distant electric field due to a lightning strike on a tall structure [15]. In another literature study, an approximate formula was proposed for evaluating the peak values of lightning-induced voltages in the presence of highly resistive soils [16]. Finally, another recent study in the literature discussed the widespread use of the FDTD method, one of the full-wave numerical approaches, to simulate electromagnetic transients in earthing structures, such as earthing grids for substations [17].…”

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

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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: Introductionmentioning

confidence: 99%