Impulse and 60-cycle characteristics of driven grounds — II

Bellaschi, P. L.; Armington, R. E.; Snowden, A. E.

doi:10.1109/ee.1942.6436334

Cited by 22 publications

(46 citation statements)

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“…For this reason too, the capacitive effects are not widely mentioned in this paper. The voltage and current traces as can be seen in Figures 4a, 4b, 4c and 4d, also do not show much of the presence of the capacitive effects, which is normally seen as oscillations in the voltage and current traces, as highlighted in Refs [21,[23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: B High Impulse Currents Testsmentioning

confidence: 99%

“…Many publications [4,[21][22][23][24] have defined R impulse as the V at I peak /I peak . The reason the authors in these publications [4,[21][22][23][24] used this formula for R impulse is that at I peak , di/dt equals to zero, thus no inductive effects are taken into account. As for the capacitive effects, these are neglected in many analyses [25][26][27][28][29].…”

Section: B High Impulse Currents Testsmentioning

confidence: 99%

“…In this study, the soil resistivity of low resistivity soil, which is less than 1000 Ωm, thus it is expected to have inductive effect to be more significant than capacitive effect. This inductive effect can be minimized by using the measurement of V@I peak /I peak , as used in other publications [21][22][23][24]. For this reason too, the capacitive effects are not widely mentioned in this paper.…”

Section: B High Impulse Currents Testsmentioning

confidence: 99%

“…Genetic Algorithm is then applied, where the details of these measurements can be found in Refs. [24][25][26]. The results of soil resistivity values of layers 1 and 2, and height of layer 1 is shown in Figure A3.…”

Section: Appendixmentioning

confidence: 99%

See 3 more Smart Citations

Performance of Earthing Systems for Different Earth Electrode Configurations

Yunus

Nor

Etobi

et al. 2015

IEEE Trans. on Ind. Applicat.

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Section: B High Impulse Currents Testsmentioning

confidence: 99%

Section: B High Impulse Currents Testsmentioning

confidence: 99%

Section: B High Impulse Currents Testsmentioning

confidence: 99%

Section: Appendixmentioning

confidence: 99%

See 2 more Smart Citations

Performance of Earthing Systems for Different Earth Electrode Configurations

Yunus

Nor

Etobi

et al. 2015

IEEE Trans. on Ind. Applicat.

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“…Reducing the impulse grounding resistance of transmission line tower grounding system is the effective measure to improve the lightning impulse withstand level [1], the impulse grounding resistance will directly affect the line lighting protection effect [2]. Lighting current flows into the earth through the grounding conductor, it will increase the local field strength around the conductor and make the spark discharge happened when the field strength exceeds the soil breakdown electric field strength [3]. And the spark discharge will increase the equivalent grounding radius and the soil conductivity [3].…”

Section: Introductionmentioning

confidence: 99%

The Simulation Experiments on Impulse Characteristics of Tower Grounding Devices in Layered Soil

Long¹,

Li²,

Rao³

et al. 2017

IJET

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Reducing the impulse grounding resistance of transmission line tower grounding system is the major measure to improve the lightning impulse withstand level and to ensure power system stability. For tower mainly adopts box with radiation grounding devices, this paper uses simulation experiments method based on similarity theory, researches the influence of radiation length, radiation angle and the proportion of box and radiation, branch length on the box with radiation grounding devices' impulse characteristics in layer soil model. Results of the experiments show that the branches have an effective use of length, the box and radiation have an optimal proportion, over length radiation or improper proportion will render the resistance reduction ineffective. According to the results of the experiments, we have gotten the optimal length rays add branch and put forward an impulse characteristics features better tower grounding structure which is named T2-15-25&H2-15. There are some references for engineering.

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A new soil ionization model for grounding electrodes

Mokhtari

Abdul‐Malek

Gharehpetian

2016

Int. Trans. Electr. Energ. Syst.

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Summary This paper proposes a new model of soil ionization, in the form of an equivalent circuit containing capacitive and resistive elements representing a network of soil particles and air voids. In previously published models, the effect of soil ionization is only indirectly considered by changing the soil resistivity and the electrode radius. This has resulted in inferior performance of those models in terms of voltage response accuracy. In this work, the energy balance concept was applied to compute the arc resistance. The soil structure is modeled by using two‐layer capacitor elements. The soil ionization process is incorporated inside the two‐layer capacitor elements using specially derived differential equations. Unlike previous models, a discrete form of soil ionization is used. The accuracy of the proposed equivalent circuit model was confirmed by the small differences between the computed and experimental results.

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Impulse and 60-cycle characteristics of driven grounds — II

Cited by 22 publications

References 0 publications

Performance of Earthing Systems for Different Earth Electrode Configurations

Performance of Earthing Systems for Different Earth Electrode Configurations

The Simulation Experiments on Impulse Characteristics of Tower Grounding Devices in Layered Soil

A new soil ionization model for grounding electrodes

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