Time-domain modeling of grounding systems' impulse response incorporating nonlinear and frequency-dependent aspects

O Kherif, S Chiheb, M Teguar… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
At lightning discharge, the grounding systems' transient behavior is influenced by time-
dependent nonlinear behavior and frequency-dependent effects. These effects are related to …

Transient behaviour of grounding electrodes in uniform and in vertically stratified soil using state space representation

S Chiheb, O Kherif, M Teguar… - IET Science …, 2018 - Wiley Online Library
This investigation is devoted to study, in time domain, the transient behaviour of vertical and
horizontal grounding conductors submitted to impulse current using state space …

Impulse characteristics of tower grounding devices considering soil ionization by the time-domain difference method

Z Feng, X Wen, X Tong, H Lu, L Lan… - IEEE Transactions on …, 2015 - ieeexplore.ieee.org
Knowledge of impulse characteristics of tower grounding devices is important for lightning
protection of the transmission lines. In this paper, the time-domain difference method is …

Effects of high frequency modeling & grounding system parameters on transient recovery voltage across vacuum circuit breakers for capacitor switching in wind power …

NA Kafshgari, N Ramezani, H Nouri - … Journal of Electrical Power & Energy …, 2019 - Elsevier
This paper investigates the transient recovery voltages across vacuum circuit breakers used
for the switching shunt capacitor bank in wind power plants, which are connected to the …

Influence-factor analysis and parameter calculation of soil discharge and recovery characteristics under successive impulse currents

D Luo, W Sima, T Yuan, P Sun… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
Lightning usually contains multiple return strokes. Under multiple impulse currents, the main
characteristics of soil media are not only those of breakdown but also those associated with …

A study of human safety against lightning considering the grounding system and the evaluation of the associated parameters

DS Gazzana, AS Bretas, GAD Dias, M Telló… - Electric Power Systems …, 2014 - Elsevier
This paper presents a study about the influence of different types of soils and surge wave
characteristics in terms of human safety. The study is focused on the step, contact and …

An improved soil ionization representation to numerical simulation of impulsive grounding systems

DS Gazzana, AB Tronchoni… - IEEE Transactions …, 2017 - ieeexplore.ieee.org
This paper presents a hybrid method based on the transmission line modeling method
(TLM) aiming to represent the soil ionization effect for grounding systems simulation. This …

Transmission line dynamic circuit model for effective length of ground electrode under lightning transients

K Manickavasagam - IEEE Transactions on Electromagnetic …, 2021 - ieeexplore.ieee.org
The effective length of the ground electrode is one of the primary research interests of
lightning grounding system design. In this article, using a practical numerical analysis, a new …

Analysis of grounding system transient with consideration of soil ionization and mutual coupling effect

KP Sengar, K Chandrasekaran - Journal of Electrical Systems and …, 2023 - Springer
The grounding system of an electrical substation provides safety to both operator and
equipment. The lightning current waveform has a major influence on the dynamic …

Comprehensive formulae for effective length of multiple grounding electrodes considering different aspects of soils: Simplified multiconductor transmission line …

SS Sajjadi, V Aghajani… - International Journal of …, 2020 - Wiley Online Library
In this paper, an approximate modeling approach called simplified multiconductor
transmission line model (simplified MTL) is proposed for transient analyses of multiple …