Performance of HV transmission line insulators in desert conditions. III. Pollution measurements at a coastal site in the eastern region of Saudi Arabia

Akbar, M.S.; Zedan, F.M.

doi:10.1109/61.103768

Cited by 28 publications

(7 citation statements)

References 2 publications

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“…The pollution degree is defined by the equivalent salt deposit density (ESDD) and represents the concentration of NaCl that, when dissolved in demineralized water, gives the same volumetric conductivity as that of the natural deposit removed from a given surface of the insulator divided by the area of the surface, generally expressed in mg/cm 2 . However, in the real field, the pollution constitution depends on the local environment where NaCl is not the predominant salt, as established by many researchers [7,8,[11][12][13][14][15]. On the other hand, the pollution layer contains insoluble materials consisting mainly of ferrite, silica, and alumina [4,9,13,[15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Modeling of the Effect of ESDD/NSDD on AC Flashover of SiR Outdoor Insulators

et al. 2022

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Pollution flashover occurs when soluble and nonsoluble materials cover the surface of an insulator, and this may ultimately cause a reduction in its performance. In this paper, the common type of sodium chloride (NaCl) was used as a soluble pollutant (ESDD) and kaolin as a nonsoluble pollutant (NSDD). Samples of silicone rubber (SiR) insulators were selected for this study and fabricated at the Advanced High Voltage Engineering Research Centre (AHIVEC) at Cardiff University. The samples were preconditioned and polluted according to standard specifications. Additionally, the AC voltage ramp technique was used to achieve flashover (FOV) voltage with different pollution levels. The aim of this work was to investigate the effect of nonsoluble materials on flashover characteristics to understand their interaction with dry-band arcs by using FOV electrical equations and experimental data. The test results show that the FOV voltage of the silicone rubber insulator substantially decreased with the increase in both ESDD and NSDD values. It was also identified from these results that the dry-band arcs were considerably influenced by both ESDD and NSDD levels. This impact can be quantified by determining the variation of discharge parameters (N, n). Based on the FOV equations and experimental data, a mathematical model was suggested, taking into account the effect of both ESDD and NSDD.

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Section: Introductionmentioning

confidence: 99%

Experimental Study and Modeling of the Effect of ESDD/NSDD on AC Flashover of SiR Outdoor Insulators

et al. 2022

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“…The constitution of this pollution differs from one site to another. However, the main elements that are found are minerals and insoluble materials [1][2][3][4][5][6][7]. Numerous studies have been conducted to determine the influence of pollution constitution on flashover characteristics [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of pollution constituents on DC flashover of high voltage insulators

Slama

Béroual²,

Hadi³

2013

IEEE Trans. Dielect. Electr. Insul.

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International audienceThis paper is aimed at the study of the influence of the chemical constitution of pollution on dc flashover discharge of high voltage contaminated insulators. It's shown that the type of salt and salt mixture has an influence on the critical currents for both polarities but doesn't affect significantly the critical voltages whereas the concentration of insoluble matters (Non Soluble Density Deposit, NSDD) has an influence on both critical current and critical voltage. The discharge parameters characteristics N and n depend on the chemical constitution of pollution, the concentration of NSDD and the polarity of voltage. It's also shown that the most important constituent of the discharge column are water vapour and air; and the transfer of metallic ion has no significant influence on flashover voltage

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“…In the context of sliding discharges occurring on clean or dry bushing surfaces, the initiation voltage for sliding discharge can be deduced through the transmission line model [21,27].…”

Section: The Development Of the Arc On The Surface Of Polluted Ac Bus...mentioning

confidence: 99%

Effect of vertical electric field components on the local arc development along contaminated surfaces

Wen,

Cao,

Wang

2024

Phys. Scr.

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During operation, a vertical-component electric field emerges on the surface of high-voltage AC bushings. This unique electric field structure renders the bushing more susceptible to discharge and flashover. However, limited attention has been paid to studying the flashover characteristics resulting from surface pollution in such electric fields. This investigation, involving four differently structured bushings as well as post insulators, delves into the impact of pollution, creepage distance, and electric field structure on bushing flashover characteristics. The study reveals that increasing the creepage length of heavily polluted bushings does not significantly enhance their flashover voltage. Moreover, the role of the vertical electric field in the local arc development was analysed. This research could provide valuable references for future bushing design in polluted areas.

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Performance of HV transmission line insulators in desert conditions. III. Pollution measurements at a coastal site in the eastern region of Saudi Arabia

Cited by 28 publications

References 2 publications

Experimental Study and Modeling of the Effect of ESDD/NSDD on AC Flashover of SiR Outdoor Insulators

Experimental Study and Modeling of the Effect of ESDD/NSDD on AC Flashover of SiR Outdoor Insulators

Influence of pollution constituents on DC flashover of high voltage insulators

Effect of vertical electric field components on the local arc development along contaminated surfaces

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