Evaluation of Lightning Electromagnetic Fields and Their Induced Voltages on Overhead Lines Considering the Frequency Dependence of Soil Electrical Parameters

Akbari, Mohsen; Sheshyekani, Keyhan; Pirayesh, Abolfazl; Rachidi, Farhad; Paolone, Mario; Borghetti, Alberto; Nucci, Carlo Alberto

doi:10.1109/temc.2013.2258674

Cited by 88 publications

(17 citation statements)

References 39 publications

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“…Note that we have considered a simple, homogeneous model for the ground with constant, frequencyindependent electrical parameters. A more thorough analysis taking into account the soil inhomogeneity (e.g., [7] and [13]) and frequency dependence (e.g., [17], [34], and [53]) is beyond the scope of this paper.…”

Section: Discussionmentioning

confidence: 99%

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On Lightning Electromagnetic Field Propagation Along an Irregular Terrain

Azadifar

Rachidi

et al. 2016

IEEE Trans. Electromagn. Compat.

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Abstract-In this paper, we present a theoretical analysis of the propagation effects of lightning electromagnetic fields over a mountainous terrain. The analysis is supported by experimental observations consisting of simultaneous records of lightning currents and electric fields associated with upward negative lightning flashes to the instrumented Säntis tower in Switzerland. The propagation of lightning electromagnetic fields along the mountainous region around the Säntis tower is simulated using a full-wave approach based on the finite-difference time-domain method and using the two-dimensional topographic map along the direct path between the tower and the field measurement station located at about 15 km from the tower. We show that, considering the real irregular terrain between the Säntis tower and the field measurement station, both the waveshape and amplitude of the simulated electric fields associated with return strokes and fast initial continuous current pulses are in excellent agreement with the measured waveforms. On the other hand, the assumption of a flat ground results in a significant underestimation of the peak electric field. Finally, we discuss the sensitivity of the obtained results to the assumed values for the return stroke speed and the ground conductivity, the adopted return stroke model, as well as the presence of the building on which the sensors were located.

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Section: Discussionmentioning

confidence: 99%

“…such as stratified and mixed path (e.g., [6]- [15]), frequencydependent ground parameters (e.g., [16] and [17]), and more recently orography were also studied (e.g., [18]- [22]). …”

mentioning

confidence: 99%

On Lightning Electromagnetic Field Propagation Along an Irregular Terrain

Azadifar

Rachidi

et al. 2016

IEEE Trans. Electromagn. Compat.

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“…This paper considers the soil parameters (resistivity and permittivity) as constant values, although there is some evidence that these parameters may be frequency-dependent [22]. However, Akbari et al [23] and Sheshyekani and Akbari [24] show that the lightning induced voltages on aerial lines are not significantly affected by the frequency dependence of the soil electrical parameters, as long as the soil resistivity value is lower than or equal to 1000 m. As the simulations presented in this paper consider the maximum soil resistivity value equal to 1000 m, it means that the simulation results are unlikely to be affected the frequency dependency of the soil parameters.…”

Section: Discussionmentioning

confidence: 99%

Assessment and analysis of indirect lightning performance of overhead lines

Paulino

Barbosa

Lopes

et al. 2015

Electric Power Systems Research

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“…In this modeling, the frequency dependence behavior of the soil electrical parameters is ignored [18]- [20]. Concerning the frequency dependence of soil electrical parameters, the model proposed by Longmire and Smith is used [21].…”

Section: Tower Footing Impedancementioning

confidence: 99%

Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

Gholinejhad¹,

Shariatinasab²,

Sheshyekani³

2018

AEM

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This paper presents a probabilistic evaluation, based on Monte-Carlo method, for the estimation of insulation risk of failure of overhead transmission lines (TLs). The proposed method takes into account the wide-band model of towerfooting grounding system. The wide-band model of grounding system in frequency domain is obtained by the method of moment solution to the governing electrical field integral equations. The electrical parameters of soil are considered to be either constant or frequency dependent. The time-domain representation of the grounding system is inferred through pole-zero characterization of its associated frequency response. The case of a typical 400-kV transmission line is modelled in EMTP_RV with the towerfooting grounding system integrated with the transmission line (TL) system. The results of the paper show that the failure risk of transmission lines is affected by the grounding system model. This effect is more pronounced when the soil electrical parameters are assumed to be frequency dependent.

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Evaluation of Lightning Electromagnetic Fields and Their Induced Voltages on Overhead Lines Considering the Frequency Dependence of Soil Electrical Parameters

Cited by 88 publications

References 39 publications

On Lightning Electromagnetic Field Propagation Along an Irregular Terrain

On Lightning Electromagnetic Field Propagation Along an Irregular Terrain

Assessment and analysis of indirect lightning performance of overhead lines

Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

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