Factors affecting transient response of grounding grid systems

Gouda, Osama E.; Amer, Ghada M.; EL-Saied, T. M.

doi:10.1109/ssd.2008.4632800

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…GPR (Ground Potential Rise) atau kenaikan potensial tanah terjadi karena adanya arus yang mengalir pada sistem yang ditanahkan [13]. Untuk menentukan nilai GPR pada sistem pentanahan gardu induk, dimana terlebih dahulu dihitung nilai arus surja petir dapat dirumuskan dalam persamaan [14] [15]:…”

Section: B Gpr (Ground Potensial Rise)unclassified

Analisis Pentanahan Gardu Induk Akibat Surja Petir Menggunakan Finite Elemen Method

Fitriani¹,

Syafriwel²,

Hidayat³

et al. 2023

JJEEE

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Sambaran petir pada sistem tenaga bisa mengganggu keandalan sistem, serta senantiasa jadi salah satu tantangan utama dalam proses desain gardu induk. Hal- hal yang butuh dicermati dalam mendesain sistem pentanahan diantaranya, peningkatan tegangan tanah (Grond Potensial Rise), keamanan tegangan langkah serta tegangan sentuh pada gardu induk, dan besarnya nilai impedansi akibat dari surja petir. Tujuan dari penelitian ini untuk melihat besar arus sambaran petir yang terjadi pada gardu induk dengan variasi area zona pentanahan grid pada gardu induk. Adapun simulasinya menggunakan aplikasi ETAP memakai metode FEM (Finite Element Method) dibuat untuk menampilkan ikatan antara luas zona grid, dimensi konduktor serta peningkatan GPR akibat sambaran surja petir. Nilai kenaikan tegangan yaitu sebesar 13289V, tegangan sentuh yang didapat sebesar 490,1V pada bobot badan 50kg dan 663,4V bobot badan 70kg, sedangakan untuk tegangan langkah yaitu sebesar 1372,5V pada bobot badan 50kg dan 1857,6V bobot badan 70kg pada luas zona grid 10 x 10 m2. tegangan sentuh yang didapat sebesar 832,87V pada bobot badan 50kg dan 1127,2V bobot badan 70kg. sedangakan untuk tegangan langkah yaitu sebesar 2743,2V pada bobot badan 50kg dan 3712,8V bobot badan 70kg pada luas zona grid 50 x 50 m2. Hasil akumulasi arus gangguan akibat sirja petir dengan variasi arus injeksi dimana semakin besar arus injeksi yang diberikan maka semakin besar arus gangguan surja petir yang timbul.Lightning strikes in power systems can compromise system reliability and have always been one of the major challenges in the substation design process. Things that need to be considered in designing a grounding system include ground voltage increase (Ground Potential Rise), step voltage safety and touch voltage at the substation, and the magnitude of the impedance value due to lightning surges. The purpose of this study is to see the magnitude of the lightning strike current that occurs at the substation with variations in the area of the grid grounding zone at the substation. The simulation using the ETAP application using the FEM (Finite Element Method) method is made to display the bond between the grid zone area, conductor dimensions, and the increase in GPR due to lightning strikes. The voltage increase value is 13289V, the touch voltage obtained is 490.1V at 50kg body weight and 663.4V 70kg body weight, while the step voltage is 1372.5V at 50kg body weight and 1857.6V 70kg body weight at zone area grids 10 x 10 m2. The touch voltage obtained is 832.87V for a body weight of 50kg and 1127.2V for a body weight of 70kg. while the step voltage is 2743.2V for a body weight of 50kg and 3712.8V for a body weight of 70kg for a grid zone area of 50 x 50 m2. The accumulated fault current results from lightning surges with injection current variations where the greater the injection current, the greater the lightning surge fault current that arises.

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Section: B Gpr (Ground Potensial Rise)unclassified

Analisis Pentanahan Gardu Induk Akibat Surja Petir Menggunakan Finite Elemen Method

Fitriani¹,

Syafriwel²,

Hidayat³

et al. 2023

JJEEE

View full text Add to dashboard Cite

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“…For the optimal design of grounding grid system, the optimal compression ratio (OCR) could be determined, in which the touch voltage reaches its minimum if the grounding grid is designed using this compression ratio [10]. An empirical expression is suggested to calculate OCR as follows [8–10]

OCR = a_{0} + a_{1} \exp false(0.0001 h false) + a_{2} \exp false(b h false)

where

b = - 0.3503 - 9.6311 \exp ()(, - 0.03666 L)

a_{0} = a_{01} + a_{02} k + a_{03} k^{2}

a_{1} = a_{11} + a_{12} k + a_{13} k^{2}

a_{2} = a_{21} + a_{22} k

where k is the number of segments of the conductor in any direction; and h is the grid laying depth. The relationship between a 0 , a 1 … and L is given in Table 1 [10–12].…”

Section: Unequally Spaces Grids Design Proceduresmentioning

confidence: 99%

“…It also costs less to install the grid [7]. Under very high and steep rising current waves, complex model of grounding grid contains resistance, inductance and capacitance is used to calculate the GPR and surge impedance of grounding grid [8, 9].…”

Section: Introductionmentioning

confidence: 99%

Ground potential rise of faulty substations having equal and unequal spacing grounding grids conductors

Gouda¹,

Dein

2017

IET Generation, Transmission & Distribution

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“…To maximize the efficiency of a grounding system, one critical aspect that demands attention is grounding impedance, as underscored by Azmi et al [2]. Furthermore, Gouda et al [3] conducted an extensive investigation into the number and arrangement of soil layers, layer thickness, and the reflection factor between these layers. These factors significantly influence the total ground resistance of grounding systems.…”

Section: Introductionmentioning

confidence: 99%

Effect of Grid Depth on the Performance of Ground Grid under Influence of Line to Ground Fault

Hefny,

El Dein,

El-Tayeb

2024

International Journal of Applied Energy Systems

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There are many factors that affect the grounding process, so adapting these factors helps in achieving the best results for the grounding system. It is important to study some natural properties around the ground grid to create an appropriate environment for the grounding process. This paper aims to study the effect of the grid depth on the performance of the grounding grid with the effect of applying a specific line fault based on the experimental work and using simulation program based on Finite Element Method (FEM). The effect of the change in the laying depth of the grid was monitored on the total ground resistance, the Earth Surface Potential (ESP), the current density, and the electric field of the ground grid. Also, the following soil properties have been taken into consideration; the water content, the thermal and electrical conductivity, heat capacity, density, and the relative permittivity coefficient of the soil. From the obtained results, it is noticed that by increasing the depth of the grounding grid, a decrease in the total ground resistance was observed and there is a change in the performance of the ground grid. The findings of this investigation offer priceless insights: as grid depth rises, there is a noticeable decrease in overall ground resistance, indicating improved grounding system performance. Variations in ESP, electric field distribution, and current density further highlight the complex nature of the effects of grid depth. The study is significant in that it emphasizes the crucial part that soil characteristics play an important role in determining how grounding systems behave and the need to take these factors into account when designing a grounding system. This study makes a substantial contribution to grounding system optimization, potentially enhancing electrical safety and dependability in a variety of applications. It provides a starting point for further investigation and improvement in the search for better and more effective grounding solutions.

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Factors affecting transient response of grounding grid systems

Cited by 7 publications

References 6 publications

Analisis Pentanahan Gardu Induk Akibat Surja Petir Menggunakan Finite Elemen Method

Analisis Pentanahan Gardu Induk Akibat Surja Petir Menggunakan Finite Elemen Method

Ground potential rise of faulty substations having equal and unequal spacing grounding grids conductors

Effect of Grid Depth on the Performance of Ground Grid under Influence of Line to Ground Fault

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