Analytical Models for Distributed Grounding Systems

Devgan, S.S.; Whitehead, E. R.

doi:10.1109/tpas.1973.293725

Cited by 42 publications

(13 citation statements)

References 3 publications

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“…There is a lack of carefully documented experimental work of which noteworthy examples are [11]- [14]. Recently computerized analysis methods have been developed based on different approaches, for example, on circuit theory [15]- [19], transmission line theory [21]- [27], electromagnetic field theory [28]- [37], and hybrid methods [38]- [40].…”

mentioning

confidence: 99%

Impulse Efficiency of Ground Electrodes

Grcev

2009

IEEE Trans. Power Delivery

157

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Abstract-The lightning current waveform has a major influence on the dynamic performance of ground electrodes. While high lightning current intensity improves the dynamic grounding performance due to ionization of the soil, very fast fronted pulses might worsen the performance in case of inductive behavior. The previous analysis has often been based on quasistatic approximation that is not applicable to very fast fronted pulses. To extend the analysis to fast fronted pulses in this paper, the full-wave analysis method based on the rigorous electromagnetic-field theory approach is used. In addition, realistic lightning current waveforms are applied, which reproduce the observed concave rising portion of typical recorded lightning current pulses. Based on the simulation results, new empirical formulas applicable for slow and very fast fronted lightning current pulses are proposed. The effects of the ionization of the soil are disregarded; therefore, the new formulas are applicable for a conservative estimate of the upper bound of the impulse impedance of ground electrodes.

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confidence: 99%

Impulse Efficiency of Ground Electrodes

Grcev

2009

IEEE Trans. Power Delivery

157

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“…16 and 17 were obtained under the conditions shown in Table 11. Arc resistance of the circuit breaker and grounding impedance [9] [ I O ] of the cable were simulated as shown in Figs. 18 and 19.…”

Section: Test Resultsmentioning

confidence: 99%

Reignition surges at reactor current interruption in cable-system GIS

Zaima

Okabe

Nishiwaki³

et al. 1990

IEEE Trans. Power Delivery

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Both a I50MVA reactor current interruption test using a GIS on an actual 275kV cable system and a laboratory highfrequency current interruption test using a 300kV SF as circuit breaker were conducted. The results of these tests and their analyses, made simultaneously, enabled the calculation of reignition surges and the detection of high-frequency arc extinctions caused when the reactor current was interrupted by a GIS on a cable system and they also enabled an evaluation of voltage escalation caused at highfrequency arc extinctions.6 . g

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“…Once the closed form of Green's function of a scalar monopole or vector dipole in the horizontal multilayered earth model has been obtained, the mutual induction coefficient (9) or mutual impedance coefficient (11) can quickly be calculated, which is just the same as (10) or (12). And a pair of quasi-static complex image coefficients are a n and e À ta n , where N c is the maximum of a n and b n .…”

Section: The Closed Form Of the Green's Function Of A Point Source Inmentioning

confidence: 99%

“…More recent work is summarized in [4]. Recently, computerized analysis methods have been developed based on different approaches, for example, on circuit theory [5][6][7][8], transmission line theory [9][10][11][12][13][14][15], electromagnetic field theory [16][17][18][19][20][21][22][23], and hybrid methods [24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

A novel mathematical model for the lightning response of a grounding system buried in multilayered earth based on the quasi‐static complex image method

Fan

et al. 2011

Int Trans Elec Energy Syst

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SUMMARY A novel mathematical model for accurately computing the lightning currents flowing in the grounding system of a high voltage a.c. substation, buried in multilayered earth, has been developed in this paper. Together with the fast Fourier transform (FFT), the conducting effect of harmonic wave components of these currents and the capacitive and inductive effects from the interface between different soil layers were analysed in the frequency domain. Quasi‐static complex image methods and a closed form of Green's function were introduced to accelerate the calculation. With inverse FFT, the model can calculate the distribution of lightning currents in any configuration of the grounding system. This can be used for studying the performance of transient lightning responses to grounding systems. Copyright © 2011 John Wiley & Sons, Ltd.

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Analytical Models for Distributed Grounding Systems

Cited by 42 publications

References 3 publications

Impulse Efficiency of Ground Electrodes

Impulse Efficiency of Ground Electrodes

Reignition surges at reactor current interruption in cable-system GIS

A novel mathematical model for the lightning response of a grounding system buried in multilayered earth based on the quasi‐static complex image method

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