Effect of humidity on the breakdown characteristics of air in non-uniform fields at 30 kHz

Rodriguez, D.; Gorur, R.S.; Hansen, P.

doi:10.1109/tdei.2010.5412001

Cited by 12 publications

(13 citation statements)

References 14 publications

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“…For the configurations exhibiting corona, a nearly linear decrease in the breakdown voltage with humidity was observed. No influence of humidity was observed for gaps having streamers before breakdown 5.…”

Section: Breakdown Voltage Datamentioning

confidence: 90%

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Computer models for estimating the breakdown voltage of air in uniform and non‐uniform fields at 30 kHz

Rodriguez

Gorur

Hansen

2011

Int Trans Elec Energy Syst

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SUMMARY This paper reports on the development of models to estimate the breakdown voltage of air in uniform and non‐uniform gap configurations for the very low frequency (VLF) and low‐frequency (LF) bands. The breakdown voltage of air at VLF/LF is considerably lower and has a larger dependency on ambient humidity than at 60 Hz. Both characteristics have been explained by increased space charge formation at the higher frequencies. The models are shown to be useful for predicting breakdown voltages at VLF/LF for uniform field gap spacings up to 125 mm and non‐uniform field gap spacings up to 4 m. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Breakdown Voltage Datamentioning

confidence: 90%

“…Breakdown voltage versus gap length for the uniform field gap configuration for a humidity level of 10% RH. Curves are based on experimental data 4, 5.…”

Section: Breakdown Voltage Datamentioning

confidence: 99%

Computer models for estimating the breakdown voltage of air in uniform and non‐uniform fields at 30 kHz

Rodriguez

Gorur

Hansen

2011

Int Trans Elec Energy Syst

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“…26 And the bonding of water molecules with surface charges destroyed the low adhesion of the superhydrophobic samples. 27,28 Therefore, the droplet did not leave the surface (Fig. 10(c)) and arc discharge happened on the sample for the second and third times of applying voltage (Figs.…”

Section: Aip Advances 8 035117 (2018)mentioning

confidence: 99%

Effect of superhydrophobicity on surface damage of silicone rubber under AC voltage

Jin

Nie

et al. 2018

AIP Advances

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In this paper, the influence of superhydrophobicity on the surface damage of silicone rubber is studied. On a common silicone rubber surface, a droplet can become elongated, and arc discharge induced by the droplet can cause tracking on the silicone rubber surface. However, for a superhydrophobic silicone rubber surface, a droplet can leave the silicone rubber due to the low adhesion of the superhydrophobic surface. Accordingly, arc discharge caused by the droplet does not occur, and the surface of the silicone rubber is not affected. Results demonstrate that using a superhydrophobic surface has a significant effect on limiting the surface damage of silicone rubber.

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“…On the other hand, compressed air contains more moisture than the other candidate gases. Rodriguez et al [31,32] and H. F. A Verhaart et al [33] studied this humidity effect on the insulation characteristics in air under uniform and non-uniform fields respectively. The breakdown voltage was positively correlated with humidity under a uniform field [31].…”

Section: Surface Flashover Voltage Characteristicsmentioning

confidence: 99%

“…This breakdown voltage improvement was attributed to the increase in the electron absorption rate and the attachment coefficient (η) caused by water molecules [31,33,34]. On the other hand, there was a negative correlation between the flashover voltage and humidity under a non-uniform field in which corona occurred prior to the termination of breakdown [32]. In other words, the breakdown voltage decreases with humidity because of the influence of corona under a nonuniform field.…”

Section: Surface Flashover Voltage Characteristicsmentioning

confidence: 99%

Study on oxygen/nitrogen gas mixtures for the surface insulation performance in gas insulated switchgear

Lim

Bae

2015

IEEE Trans. Dielect. Electr. Insul.

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This paper presents a comparative study on SF 6 alternative candidate gases for the surface insulation performance of eco-friendly Gas Insulated Switchers (GIS) and Solid Insulated Switchers (SIS). The candidate gases including N 2 /O 2 mixture gas, dry air, and compressed air were proposed based on AC surface flashover experiment. These gases were compared and examined based on their surface insulation performance, pressure and gap dependence, surface insulation reliability in different temperatures, economic feasibility and easiness of manufacture. The comparison results verified that dry air had excellent properties on the comparison criteria and was the most suitable eco gas among the candidate gases for eco-friendly GIS and SIS. In addition to the comparative study on the candidate gases, their surface flashover characteristics were described in detail based on the effect of moisture contained in the candidate gases on flashover voltage and the correlation among electric field intensity, collision-ionization coefficient, electron attachment coefficient, and gap length.

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Effect of humidity on the breakdown characteristics of air in non-uniform fields at 30 kHz

Cited by 12 publications

References 14 publications

Computer models for estimating the breakdown voltage of air in uniform and non‐uniform fields at 30 kHz

Computer models for estimating the breakdown voltage of air in uniform and non‐uniform fields at 30 kHz

Effect of superhydrophobicity on surface damage of silicone rubber under AC voltage

Study on oxygen/nitrogen gas mixtures for the surface insulation performance in gas insulated switchgear

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