Designing safe and reliable grounding in AC substations with poor soil resistivity: An interpretation of IEEE STD. 80

Ackerman, A. S.; Sen, P.K.; Oertli, Clifton

doi:10.1109/pcicon.2012.6549644

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Example installation underneath a new switchyard is shown in Figure 1. The recent research review on native soil modifications indicates that the relations with high voltage substation earthing and synthetic geotextiles have not been studied [5][6] [7][8] [9][10] [11] [12][13]. This paper sheds some light on the subject since the trend to involve geotextiles is on the rise for substations within Australia and other parts of the world.…”

Section: Introductionmentioning

confidence: 99%

Safety assessment of high voltage substation earthing systems with synthetic geotextile membrane

Nazih¹

2019

J. Mechatron. Electr. Power Veh. Technol.

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High voltage substations built within areas prone to vegetation or with unfavourable subgrade conditions are paved with the addition of punched geotextiles and non-conductive synthetic fabrics underneath switchyard surfacing. The aim of this research is to identify the impact of synthetic textiles on earthing system performance through numerical analysis with the state-of-the-art software package. The new layer interferes with the earthing grids performance with a different behaviour depending on the installation above or underneath the layer with considerable impact taking place when the earthing grid is installed above the geotextile layer. Rods penetrating the geotextile can alleviate the potential voltage distribution issues and improve the earthing system performance regardless of the native soil stratification.

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Section: Introductionmentioning

confidence: 99%

Safety assessment of high voltage substation earthing systems with synthetic geotextile membrane

Nazih¹

2019

J. Mechatron. Electr. Power Veh. Technol.

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“…Many studies on soil resistivity measurements and grounding system designs have already been carried out and reported in several papers [1][2][3][4][5][6][7]. A number of interesting papers involving similar topics and their applications have been also published in recent years [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Current Density in Soil for Resistivity Measurements and Electrical Grounding Designs

Liu¹,

Dawalibi²

2017

JEEE

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Abstract:The design of electrical grounding systems is crucial to ensure people's safety and equipment integrity. The performance of the grounding system is critically dependent on the characteristics of the local soil surrounding the grounding system. Some wrong concepts and assumptions on soil electrical properties are still prevalent among professionals regarding soil resistivity measurements and grounding designs. The objective of this paper is to examine the current density in the earth surrounding measurement electrodes and electrical grounding systems and discuss the effects of soil structures on measurements and grounding related studies. The analyses described here are based on electromagnetic field theory. First, this paper examines soil resistivity measurements using the Wenner method in three typical, but different soil structure models, by exploring the distribution of earth current density in the soil surrounding the current injection electrodes. The computed results are illustrated using appropriate plots to understand better the influence of soil structure and characteristics on the current penetration across the soil layers. Furthermore, a detailed study on the influence of nearby buried grounding systems on soil resistivity measurements was also carried out. Finally, the performance of grounding systems in the three soil structure models has been studied in order to gain an intuitive understanding of the effects of soil structures on grounding. The results clarify and invalidate some misleading arguments used by a few practicians. All computed results are summarized in appropriate tables and figures which should provide helpful visual clues and useful information when planning soil resistivity measurements and designing electrical grounding systems.

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Designing safe and reliable grounding in AC substations with poor soil resistivity: An interpretation of IEEE STD. 80

Cited by 2 publications

References 2 publications

Safety assessment of high voltage substation earthing systems with synthetic geotextile membrane

Safety assessment of high voltage substation earthing systems with synthetic geotextile membrane

Analysis of Current Density in Soil for Resistivity Measurements and Electrical Grounding Designs

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