Factors affecting transient response of grounding grid systems

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

doi:10.1109/ssd.2008.4632800

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Unequally Spaces Grids Design Procedures1

Introduction1

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Cited by 4 publications

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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%

See 1 more Smart Citation

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

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Dein

2017

IET Generation, Transmission & Distribution

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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%