Degradation of various polymeric materials in clean and salt fog conditions: measurements of AC flashover voltage and assessment of surface damages

Douar, M. A.; Béroual, Abderrahmane; Souche, X.

doi:10.1109/tdei.2014.004434

Cited by 24 publications

(17 citation statements)

References 23 publications

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“…As concerns the particle parameters of size, amount and distribution, the major results can be summarized as follows: (1) Fine metal particles on the insulator surface under AC voltage conditions show simultaneous behaviors of erratic horizontal movement and vertical lift-off, which cause distortion and intensification of electric stresses inducing surface discharges under a rather low voltage. (2) Flashover voltage shows a decreasing tendency as particle size is reduced and particle amount is increased.…”

Section: Discussionmentioning

confidence: 99%

“…Then, the summation of the pixel values in the matrix can be obtained through Equation (1), which indicates the discharge intensity of the obtained discharge image. A bigger value of S means more intensive discharges on the specimen surface.…”

Section: Data Processing Methodsmentioning

confidence: 99%

“…Outdoor insulators are essential components in the structure and operation of transmission and distribution lines and substations, providing both mechanical connection and electrical insulation for conductors at different voltage levels or for conductors to the ground [1][2][3][4]. From the viewpoint of actual operations, due to direct exposure to atmospheric environments, the variation of aerial components, including both gaseous and solid pollutants, inevitably influences insulator performance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Fine Metal Particles on Surface Discharge Characteristics of Outdoor Insulators

Liu

Xia

et al. 2016

Energies

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Abstract:Focusing on the influence of fine metal particles on the insulation characteristics of outdoor insulators, spherical micrometer-level iron powders were used to represent fine metal particles of different parameters on a polymer insulator specimen surface. Dynamic movement and lift-off behavior of fine particles, as well as the triggered surface discharges under AC voltage were investigated in a uniform electric field under different experimental conditions. The results reveal that the inception, propagation and intensity of surface discharges are significantly affected by the particle parameters, including particle size, amount and distributing characteristic. Based on the measurement of light emission during the flashover process using a high-speed camera, the process of surface discharge to flashover triggered by the fine metal particles were investigated to obtain a relationship between flashover voltage, discharge light intensity and particle parameters. It is suggested that particle size smaller than 28 µm and particle amount more than 40 mg in contact with the non-uniform distribution can cause a significant distortion and intensification of the electric field resulting in a higher risk of surface discharges leading to flashover. Such investigations can enhance the operating reliability of outdoor insulators subjected to these conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Data Processing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Fine Metal Particles on Surface Discharge Characteristics of Outdoor Insulators

Liu

Xia

et al. 2016

Energies

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“…3 However, it also creates some new problems because of the organic nature of silicone rubber; these include surface damage induced by arc discharge. [4][5][6][7] Because water droplets are present on composite insulators in a humid environment, leakage current can increase, resulting in arc discharge on the insulators. [8][9][10][11][12] The heat from arc discharge can cause surface deterioration of silicone rubber, such as tracking and erosion.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11][12] The heat from arc discharge can cause surface deterioration of silicone rubber, such as tracking and erosion. 4,5,13 After tracking occurs, the strength of the insulation is lost and cannot be recovered. 13 Therefore, many researchers focus on how to deter it.…”

Section: Introductionmentioning

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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Electrical and Optical Uses

2019

Liquid Silicone Rubber

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Degradation of various polymeric materials in clean and salt fog conditions: measurements of AC flashover voltage and assessment of surface damages

Cited by 24 publications

References 23 publications

Influence of Fine Metal Particles on Surface Discharge Characteristics of Outdoor Insulators

Influence of Fine Metal Particles on Surface Discharge Characteristics of Outdoor Insulators

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

Electrical and Optical Uses

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