Influence of different multilayer soil models on grounding system resistance

Karnas, G.; Maslowski, Grzegorz; Ziemba, R.; Wyderka, S.

doi:10.1109/iclp.2012.6344277

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…The effects of grid sizes on the grid performance in terms of grid potential rises were well studied [9][10][11][12][13][14][15][16][17][18][19][20][21]. In this work, a constant grid size was chosen (5 m spacing).…”

Section: Methodsmentioning

confidence: 99%

Effects of lightning impulse front time on substation grounding system performance

Adnan

Malek

Din³

et al. 2020

IJEECS

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<table width="593" border="1" cellspacing="0" cellpadding="0"><tbody><tr><td valign="top" width="387"><p>The role of the grounding system in the safety of the power system and protection of personnel is obvious during an unexpected short circuit or lightning discharge at the substation. The aim of this work is to analyze the effects of several parameters: lightning impulse front time, soil resistivity and types of grid materials on the grounding system of the Substation. The ground potential rise (GPR), touch voltage and step voltage of a 50 m x 60 m grounding grid buried at a depth of 0.5 m were computed using CDEGS when injected by impulse with different front times. Results show that the shorter the front time of lightning impulse waveform, the higher the value of GPR, touch voltage and step voltage. Meanwhile, when the value of soil resistivity is increased, the value of GPR, touch voltage and step voltage is also increased. Lastly, different types of grid conductor materials give different values of GPR, touch voltage and step voltage. However, it can be said that the differences are too small to be of any significance.</p><p> </p></td></tr></tbody></table>

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Section: Methodsmentioning

confidence: 99%

Effects of lightning impulse front time on substation grounding system performance

Adnan

Malek

Din³

et al. 2020

IJEECS

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“…The knowledge about the earth structure is important for designing the grounding systems. Usually, the ground can be represented by the horizontally stratified multilayer structure model, about which one must know the number of layers, the thickness and resistivity of the soil in each layer [1]- [3]. The electrical apparent resistivity, which can be measured by Wenner configuration method, can reflect the soil electrical behavior [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Parameter Estimation of a Horizontally Multilayered Soil With a Fast Evaluation of the Apparent Resistivity and its Derivatives

Yang

Zou

2020

IEEE Access

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The information of earth structure is curial for designing the grounding system and evaluating the transmission line parameters. In order to obtain the earth structure using the measured data, an efficient algorithm for the parameter estimation of a horizontally multilayered soil by using a novel integration method is proposed. In the proposed algorithm, an adaptive iteration process will terminate till the predefined error reaches the requirement, where the earth parameters, such as the layer depth, layer resistivity, and layer number, are adjusted accordingly with the help of the Levenberg-Marquardt algorithm. In each iteration, the key is to evaluate the apparent resistivity and its partial derivatives with respect to soil parameters, which are expressed in the form of general Sommerfeld integral (GSI). In this paper, the GSI is divided into two parts. The first part with an infinite upper limit is integrated along a novel complex integration path instead of the conventional real axis path, which makes the evaluation of the GSI highly efficient due to the fast damping property of the transformed kernel. The second part with the finite integral interval is calculated using the cubic spline technique to have a semi-analytic expression, which can avoid evaluating the oscillatory kernel. In comparison with the results in the published literatures, numerical examples show that the proposed soil parameters estimation approach can reach good accuracy, and is robust and efficient. The reason is simple as the GSIs are calculated by using the well-designed and sophisticated approach. With extensive numerical experiments, the proposed algorithm is believed to be a capable and applicable candidate in engineering to invert the information of the earth structure.

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Estimation of horizontal multilayer soil parameters using Newton interpolation polynomial and h-DETLBO method

Sengar

Chandrasekaran

2020

Electr Eng

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Influence of different multilayer soil models on grounding system resistance

Cited by 7 publications

References 2 publications

Effects of lightning impulse front time on substation grounding system performance

Effects of lightning impulse front time on substation grounding system performance

Parameter Estimation of a Horizontally Multilayered Soil With a Fast Evaluation of the Apparent Resistivity and its Derivatives

Estimation of horizontal multilayer soil parameters using Newton interpolation polynomial and h-DETLBO method

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