Determination of Threshold Electric Field of Practical Earthing Systems by FEM and Experimental Work

Nor, N. Mohamad; Trlep, M.; Abdullah, S.; Rajab, R.; Ramar, R.

doi:10.1109/tpwrd.2012.2227511

Cited by 14 publications

(8 citation statements)

References 13 publications

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“…FEM is a numerical technique to determine the approximate solution of boundary value problems [24]. Many researchers used the FEM technique to evaluate the safety parameters of the complex earthing system [25,26]. Fig.…”

Section: Finite Element Methodsmentioning

confidence: 99%

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Effects of cost optimised grid configuration on earthing system performance: a comparative assessment

Sengar

Chandrasekaran

2020

IET Science, Measurement & Technology

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Section: Finite Element Methodsmentioning

confidence: 99%

“…where U g represents the grid potential, U b represents the boundary potential and E is total energy consumed in joule. The grid resistance can be modified to (27) by using (24) and (26)…”

Section: Finite Element Methodsmentioning

confidence: 99%

Effects of cost optimised grid configuration on earthing system performance: a comparative assessment

Sengar

Chandrasekaran

2020

IET Science, Measurement & Technology

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“…At present, the research on the impulse characteristics of the grounding grid mainly focuses on two aspects: numerical simulation calculation and experimental research [1][2][3][8][9][10][11]. Numerical simulation calculations mainly use electromagnetic field theory, transmission line theory, etc., to simplify the physical process and calculate the impulse characteristics of the grounding grid.…”

Section: Introductionmentioning

confidence: 99%

Measurement and analysis of impulse grounding impedance of tower grounding device subjected to artificial lightning M‐component

Zhang¹,

Cai²,

Qi³

et al. 2022

IET Generation Trans & Dist

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The impulse grounding impedance of tower grounding device is one of the important factors in the lightning protection evaluation of transmission line. The impulse characteristic test of the actual tower grounding device under lightning was rarely carried out due to the limitation of the test conditions. With the help of Guangzhou Field Experiment Site for Lightning Research and Testing, the artificial lightning characteristic test of the true tower grounding device was carried out. This paper presented partial observation experimental results and related analysis of the impulse grounding impedance of tower grounding device subjected to artificial lightning M‐component. A calculation model of the tower grounding device subjected to lightning M‐component was established. The changes of the surface soil resistivity under the action of rainwater were taken into account in the calculation. The test data and calculation results of the tower grounding device under the impact of the artificial lightning M‐component had achieved good agreement. The non‐linear ionization of the soil around the tower grounding device can be ignored, and the real impulse grounding impedance was very close to the DC grounding resistance or power frequency grounding impedance, when the tower grounding device in the experiment was subjected to lightning current M‐component.

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“…In addition, the model can also be used to analyze the impact of lightning current frequency on the impact characteristics of the grounding body [8]. With the application of the electromagnetic field theory method, the authors in [10][11][12][13][14][15] studied the influence of both soil nonlinear characteristics and grounding grid structure on impact characteristics, and then analyzed the transient characteristics of grounding devices. The calculation model based on the circuit-finite element method proposed in this paper can comprehensively consider the nonlinear effect of the soil and the high-frequency inductance effect of the grounding device.…”

Section: Introductionmentioning

confidence: 99%

Research on impulse impedance model and protection optimization of transmission tower grounding device in mountainous area

Huang

Zhou

Dong

et al. 2021

IET Science Measure & Tech

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The impulse impedance of the tower is the core parameter to evaluate the lightning protection performance of the transmission line. The high soil resistivity and the underground rock layers in the mountainous areas will induce large impulse impedance and further lead to frequent lightning striking accidents. Therefore, this paper proposes a circuit-finite element model (CFEM) and investigates the corresponding impedance-reduction optimization method of the grounding device in mountainous areas. The model takes into account the nonlinear characteristics of the soil. Based on the parallel-plate electrode and the concentric hemispheric test device, the nonlinear curves of the soil resistivity of five typical kinds of soils with the electric field intensity are obtained. To justify the CFEM, the field experiment of a single horizontal conductor is performed, with an average relative error of 4.67%. Based on the CFEM, this paper presents an impedance-reduction optimization method for the grounding device in the mountainous areas, while proposing the best design method and the optimal layout of the grounding device in the rocky zone. The research results can provide a reference for the design transformation and protection optimization of the transmission tower grounding device in mountainous areas.

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Determination of Threshold Electric Field of Practical Earthing Systems by FEM and Experimental Work

Cited by 14 publications

References 13 publications

Effects of cost optimised grid configuration on earthing system performance: a comparative assessment

Effects of cost optimised grid configuration on earthing system performance: a comparative assessment

Measurement and analysis of impulse grounding impedance of tower grounding device subjected to artificial lightning M‐component

Research on impulse impedance model and protection optimization of transmission tower grounding device in mountainous area

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