Effect of DC electric field on water droplets' movement and icing process on insulator

Han, Xingbo; Jiang, Xingliang

doi:10.1016/j.coldregions.2019.102780

Cited by 11 publications

(3 citation statements)

References 19 publications

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“…This rule is similar to that in Ref. [28]. Moreover, the ice layer is relatively dense, and the icing contour has a larger curvature and a smoother surface. In the case of energisation, the change rule of the β is consistent with that of a de‐energised insulator.…”

Section: Resultssupporting

confidence: 87%

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Influence of positive DC electric field on rime icing on the insulator and its experimental verification in the natural environment

Liu

Jiang

et al. 2022

High Voltage

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The electric field imposes a significant effect on ice accretion on the insulator. The impact of an AC electric field on insulator icing in an artificial climate chamber has been addressed. Compared with AC, DC electric field exerts an attraction on supercooled water droplets, which is more detrimental to the power system. Moreover, the icing on energised insulators is rarely studied in the natural environment. In the present research, an electrical, fluid coupled‐field simulation was carried out on the insulator. The force characteristics and motion deviation features of water droplets at different positive DC electric field strengths were studied. On this basis, rime icing on the insulator energised with different positive DC voltages was investigated in the field. Results show that the charged droplet shifts along the electric field line under a positive DC voltage. The deviation degree of the droplet increases with the increment of the voltage and droplet size and decreases with an increase in wind speed. As the voltage rises, the surface roughness, icing amount and icing length of rime ice‐covered insulator increase. Consequently, compared with that without energisation, the local collision coefficient, icing amount and icing length increase by 17.6%, 46.4% and 63.9%, respectively, under a 40 kV DC voltage.

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Section: Resultssupporting

confidence: 87%

“…This rule is similar to that in Ref. [28]. Moreover, the ice layer is relatively dense, and the icing contour has a larger curvature and a smoother surface.…”

Section: Resultssupporting

confidence: 87%

Influence of positive DC electric field on rime icing on the insulator and its experimental verification in the natural environment

Liu

Jiang

et al. 2022

High Voltage

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“…Ice accidents occur with uncontrollability and extreme difficulty of emergency treatment, which has prompted scholars to explore various solutions to these issues. Significant breakthroughs have been achieved in the icing growth model [7]- [9], icing monitoring and formation…”

Section: Introductionmentioning

confidence: 99%

Influence of Crystallization Effect During Icing Water Phase Transition on the Flashover Characteristics of Ice-Covered Insulators

Jiang

Yang

et al. 2020

IEEE Access

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The crystallization effect during the phase transition of icing water has a significant impact on the electrical performance of an ice-covered insulator. However, the spatial distribution of conductive ions in the ice layer remains poorly understood. In this study, the crystallization effect was confirmed through a condensation test of the potassium permanganate solution. The influence of freezing water conductivity, ice thickness and equivalent salt deposit density on the spatial distribution of conductive ions was determined by a triangular ice sample, wherein the effect on the flashover characteristics of ice-covered insulator was investigated. Results show that MnO − 4 migrates to the unfrozen area during freezing, thus accumulating on the droplet top. The conductivity of melted water on the exterior surface of an ice sample is considerably higher than that of icing water. The former can reach a maximum of 5.7 times the latter when the freezing water conductivity method is adopted. This value is 9.7 for a polluted ice sample. A highly conductive water film forms on the insulator surface because of the crystallization effect in the melting period, thereby improving the leakage current and reducing the residual ice resistance, which results in the decrease of flashover voltage.INDEX TERMS Crystallization effect, icing water, ice-covered insulator, leakage current, flashover voltage.

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Characterization and Analysis of Coalescence Nature of Sessile Droplet on Hydrophobic and Hydrophilic Insulator Surfaces

Jaya

Kumar

2022

Arab J Sci Eng

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Effect of DC electric field on water droplets' movement and icing process on insulator

Cited by 11 publications

References 19 publications

Influence of positive DC electric field on rime icing on the insulator and its experimental verification in the natural environment

Influence of positive DC electric field on rime icing on the insulator and its experimental verification in the natural environment

Influence of Crystallization Effect During Icing Water Phase Transition on the Flashover Characteristics of Ice-Covered Insulators

Characterization and Analysis of Coalescence Nature of Sessile Droplet on Hydrophobic and Hydrophilic Insulator Surfaces

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