Experimental investigation on breakdown characteristics of sand, bentonite and their mixes

Sabry, Riyadh Z.; Gomes, Chandima; Izadi, Mahdi; Kadir, Mohd Zainal Abidin Ab; Hizam, Hashim; Jasni, Jasronita

doi:10.1016/j.elstat.2018.04.001

Cited by 7 publications

(1 citation statement)

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“…The ability to resist the flow of electric current is the volume resistivity of the material. Hence, it is used to estimate the time required for the electrical charge to dissipate in the ground [23]. Relative permittivity shows the polarizability of material, i.e., electric field variation inside a material relative to a vacuum.…”

Section: Introductionmentioning

confidence: 99%

Application of Mineral Compounds for a High-Voltage Portable Grounding System: An Experimental Study

et al. 2021

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Electrical grounding is an indispensable part of the power system network. The grounding system is mainly affected by grounding resistance and the nature of the soil. High ground resistance produces the phenomenon of soil ionization, surface arching, and back flashover. A conventional grounding system requires the deep digging of electrodes, thus creating maintenance difficulties. This research work focuses on the safe operation of an electric power system from external and internal impulses arising due to lightning strikes or short circuits. The study proposes an application of mineral samples as grounding materials, and bentonite is used as backfilling material in portable grounding systems. A detailed experimental analysis was conducted under controlled conditions to evaluate the performance of selected materials in high-resistance soil. The problem of a deeply driven electrode is addressed by designing the portable grounding system. The study results demonstrate that the proposed portable grounding system could be installed in troubled environments such as forests, deserts, and rocky terrains. To measure the breakdown voltages of the proposed samples, X-ray Diffraction (XRD) analysis and other laboratory tests were conducted. The electric field intensities are extracted through Finite Element Analysis (FEA). The experimental and simulation findings show the expected performance of mineral samples under various operating conditions. The findings of this study can guide the practitioners for safe and efficient operations of portable electrical grounding systems.

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Section: Introductionmentioning

confidence: 99%