Designing of cost minimum substation grounding grid system using DE, SCA, and HDESCA techniques

Sengar, Kaushal Pratap; Chandrasekaran, K.

doi:10.1049/iet-smt.2019.0021

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…El gradiente de potencial generado [30], [31] en complejos refinadores de petróleo, en el caso de una falla en una subestación eléctrica, causa su transferencia a las áreas de procesos, provocando daños al sistema de instrumentación [32,33].…”

Section: Trabajos Relacionadosunclassified

Considerations in the design of electrical substations, including the effect of potential gradient on surrounding metallic structures

Chiliquinga

Robles

2022

ings

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For designing and studying an electrical substation grounding system [GS], a simple remote substation is considered according to the safety procedures indicated in the IEEE 80 Standard. Buried metallic materials or nearby metallic structures permanently endanger human life when electrical faults occur. Scenarios related to the design of electrical substations that consider the transfer of electrical potentials that can occur between the GS and buried metallic materials in their vicinity are presented, the behavior of potential transfer is evaluated, values of transferred voltages are calculated, and the main variables that influence the transferred voltage levels are identified. The simulations are performed with the CYMGRD software specific for GS calculations. Its analysis generates real results in the potential transfer that must be considered by the GS design engineer, which enables to avoid designing isolated substations without taking into account existing elements that may affect the substation surroundings.

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Section: Trabajos Relacionadosunclassified

Considerations in the design of electrical substations, including the effect of potential gradient on surrounding metallic structures

Chiliquinga

Robles

2022

ings

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“…However, the complex non-linear dynamic phenomenon of soil ionization surrounding the earthing electrode is simulated using the enlargement of an electrode radius during the injection of high impulse current on the grounding system [24][25][26][27][28][29][30]. The earthing system of any substation should be designed to meet both safe and economic conditions [31]. The transient analysis helps to design a safe and economic earthing system.…”

Section: Introductionmentioning

confidence: 99%

Transient analysis of earthing electrodes considering soil ionization phenomenon under lightning impulse condition

Sengar,

Chandrasekaran

2023

Electr Eng

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This paper presents the transient behavior of an earthing system under the influence of lightning current injected in to it. Vertical rod and horizontal electrode buried in homogeneous soil are considered in this analysis. Statespace representation based transmission line methodology is adopted with non-linear parameters for modelling the earthing electrodes in the time domain. Soil ionization phenomenon is taken up with the presence of residual resistivity. In this method, soil resistivity variation is adopted to evaluate the soil ionization phenomenon that occurs due to changes in the electric field. This study incorporates mutual coupling between the electrode segments for low and high soil resistivity. Earthing electrodes are subjected to a high-magnitude of lightning current impulse with different peaks. Transient voltage and impulse impedance are calculated to analyse the transient behaviour of earthing electrodes with soil ionization. Impulse impedance of vertical earthing rods and horizontal electrodes are calculated and compared with the power frequency impedance. Percentage ohmic reduction between them is also reported. The influences of critical electric field, soil resistivity and lightning magnitude on transient performance of earthing electrodes are calculated. Also, an effect of the front time of lightning current impulse for a fixed peak on the impedance of the earthing electrode is evaluated and a significant amount of changes are observed. Simulated results are validated with the experimental and theoretical results reported in the literature, and good agreements are found.

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Transient behaviour of grounding systems in multilayer soil under lightning strikes

Sengar

Chandrasekaran

2021

Electr Eng

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Designing of cost minimum substation grounding grid system using DE, SCA, and HDESCA techniques

Cited by 6 publications

References 21 publications

Considerations in the design of electrical substations, including the effect of potential gradient on surrounding metallic structures

Considerations in the design of electrical substations, including the effect of potential gradient on surrounding metallic structures

Transient analysis of earthing electrodes considering soil ionization phenomenon under lightning impulse condition

Transient behaviour of grounding systems in multilayer soil under lightning strikes

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