Comparison of the performance of silicone and glass barriers under direct current and very severe conditions of pollution

Belhoul, Talit; Boudissa, Rabah; Haim, Klaus Dieter

doi:10.1109/tdei.2016.005954

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…2). The interval break in proceeding between testing a sample and its new exposure to natural rain is greater than 12 h. This was chosen to allow the sample used to completely recover the hydrophobicity of its surface before its new exposure [17]. To accelerate this return of hydrophobia, all the samples are placed, after cleaning with isopropanol, in a desiccator at the end of each series of measurements.…”

Section: Experimental Devices and Measurement Techniquesmentioning

confidence: 99%

“…A break lasting more than 12 hours is observed between two successive tests on the same specimen in order to restore the hydrophobicity of the sample's surface after it has been put under voltage [17]. In order to speed up the process, the twenty samples are always placed in a desiccator after cleaning with isopropanol after each series of tests.…”

Section: Experimental Devices and Measurement Techniquesmentioning

confidence: 99%

“…The characteristic's curve V rd = f ( α, V di ), illustrated by Figs. [16][17][18], can be subdivided into three distinct zones. In the first zone, the curve is in the form of a bearing parallel to the axis of the inclination angles and extends in the This bearing corresponds to a constant volume of residual water drops and is obtained only when the insulation is de-energized (Fig.…”

Section: Humidity Rate Effect Of An Inclined Insulation On Its Electr...mentioning

confidence: 99%

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Humidification Degree Effect under Rain of Inclined Silicone Insulation on its Electric Performance

Slimani,

Medjdoub,

Kornhuber

2023

Period. Polytech. Elec. Eng. Comp. Sci.

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This investigation is focused on the effect of inclination angle with respect to the horizontal of a hydrophobic silicone insulation, on the rate of its creepage distance's wetting by natural rain. The constellation of rainwater drops obtained on the de-energized site is then reproduced in the laboratory, to quantify the effect of their volume on the humidification intensity of the inclined insulation's creepage distance, and therefore its electrical performance under different alternating voltage levels. For this purpose, two different experimental devices allowing the variation of the insulation's inclination angle were set-up. The first one is dedicated to the on-site display of silicone samples in natural rain. The second one allows the study of the applied voltage's effect on the wetting degree of the insulation's surface. All the performed tests were supported by camera visualization. On-site measurement results show a decline in the length of the creepage distance of the natural rain-wetted insulation with increasing its inclination angle. Laboratory results also show a decrease in the size of the insulation's wet surface with increasing its inclination angle. These two characteristics reveal two different intervals of critical inclination angles of the insulation, unfavorable and favorable, for the dimensioning of the insulators' sheds corresponding respectively to their minimum and maximum electrical performance.

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Section: Experimental Devices and Measurement Techniquesmentioning

confidence: 99%

Section: Experimental Devices and Measurement Techniquesmentioning

confidence: 99%

Section: Humidity Rate Effect Of An Inclined Insulation On Its Electr...mentioning

confidence: 99%

See 1 more Smart Citation

Humidification Degree Effect under Rain of Inclined Silicone Insulation on its Electric Performance

Slimani,

Medjdoub,

Kornhuber

2023

Period. Polytech. Elec. Eng. Comp. Sci.

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“…The withstand characteristics of a hybrid gas-solid insulation based on the barrier effect in typical electrode systems have been widely studied. The experimental results show that the barrier effect is significant in non-uniform electric fields [9][10][11], and the insulation performance is affected by the barrier surface pollution [12], barrier material [13], barrier position, barrier size etc. [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Breakdown path control by barrier effect for improving withstand characteristics of air‐insulated gaps under alternating voltages

et al. 2022

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A polymer barrier inserted in the interelectrode gap can significantly improve the insulation performance of air-insulated high-voltage electrical equipment. With the development of power equipment towards integration and miniaturisation, multiple barriers can be used to further increase the insulation level. This paper investigated the withstand characteristics of the air-insulated rod-rod gap with multiple barriers by changing the barrier numbers, the barrier position and the barrier insertion direction. Four control modes were set up based on the assumed breakdown paths under alternating voltages. It was found that the control modes with barriers inserted from the opposite direction had a more significant improvement effect than that from the same direction. When the horizontal barrier position was closer to the electrode and the vertical barrier position was farther to the electrode axis, the breakdown voltage was higher. The vertical barrier position was a key factor affecting the probability of breakdown path type, and the breakdown voltages along different types of breakdown paths were almost the same when the barriers were at the same position. The increase of the breakdown voltage was mainly resulted from the change of electric field distribution in the insulated gap and the extension of the breakdown path length.

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Small air gap’s performance under non-uniform electrical field with silicone tubular barriers under AC voltage

et al. 2021

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Comparison of the performance of silicone and glass barriers under direct current and very severe conditions of pollution

Cited by 6 publications

References 15 publications

Humidification Degree Effect under Rain of Inclined Silicone Insulation on its Electric Performance

Humidification Degree Effect under Rain of Inclined Silicone Insulation on its Electric Performance

Breakdown path control by barrier effect for improving withstand characteristics of air‐insulated gaps under alternating voltages

Small air gap’s performance under non-uniform electrical field with silicone tubular barriers under AC voltage

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