Influence of viscosity and conductivity of water droplets on partial discharge inception voltages of polymeric insulating surfaces

Chatterjee, Soumya; Nazemi, M. H.

doi:10.1109/epetsg.2015.7510067

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…During the experimental process, a single water droplet was placed on the SiR surface and the droplet volume was controlled by a microinjector. To enhance the droplet visibility, methylene blue was used to colourise the water droplet, which has been investigated to have a negligible effect on the conductivity and permittivity of droplets [22]. The applied voltage was homogenously increased in a small step of about 1 kV by controlling the voltage regulator.…”

Section: Simulation and Experimental Methodsmentioning

confidence: 99%

Dynamic formation mechanism of water droplet and induced surface discharges on silicone rubber composites

Liu

2019

High Voltage

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Wettability has become one of the most important factors influencing power equipment insulation system in coastal power grid, which can seriously threaten the safety of power grid. This paper aimed at numerical simulation and experimental investigation on dynamic formation mechanism of water droplet and induced surface discharges on silicone rubber composites under different AC voltages, considering the factors of surface tension and droplet volume. Obtained results reveal that the spreading coefficient increases with increasing the electric field intensity from 1 to 5 kV/cm and with increasing the droplet volume from 10 to 50 µL. The spreading coefficient shows a decreasing tendency when the surface tension increases from 29.3 to 61.0 mN/m. Moreover, the maximum of surface electric field shows an increasing tendency under the condition of increasing both the droplet volume and the surface tension. On the basis of the physical model of droplet deformation, the electric field force and the surface tension play a significant role in the process of droplet deformation. Meanwhile, the experimental results are consistent with the simulation analysis, reflecting that the droplet deformation and the induced surface discharges mainly depend on two parameters: the droplet volume and the magnitude of applied voltage.

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Section: Simulation and Experimental Methodsmentioning

confidence: 99%

Dynamic formation mechanism of water droplet and induced surface discharges on silicone rubber composites

Liu

2019

High Voltage

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“…M. H. Nazemi et al have investigated the elongation behavior of water droplet on the insulator surface at different voltage shapes (AC, DC and combined AC-DC voltages). The water droplet elongates towards different electrodes at different voltage shapes, which affects the partial discharge inception E-field intensity [10]. A. Beroual et al have investigated the coalescence of water droplet on composite insulator surface under DC electric field.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of Droplets and Flashover Characteristics for CFD and Experimental Analysis on SiR Composites

Liu

Kong

et al. 2019

IEEE Access

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The dynamic mechanism of water droplet formation has recently drawn considerable attention in research and application toward silicon rubber composite insulators. This paper is aimed at numerical simulations and experiments on the dynamic mechanism of water droplet formation with different applied voltages and droplet distribution and induced surface discharges on the insulator surface under the impact of AC electric field. The computational fluid dynamics model and experimental setup of multiple droplets were established to analyze the dynamic behavior of droplets and flashover characteristics. The obtained results reveal that the fusion first occurs between larger size droplets and the fusion is hard to happen along with the rise of the fractal dimension (FD) of droplet distribution. The elongation of droplets merges with more droplets and finally affects the electric field distribution on the insulator surface. With the increase of FD, the maximum electric field intensity shows an increasing tendency. Meanwhile, the experimental results show that with the increase of electric field intensity, the droplet fusion phenomenon becomes more obvious, which is consistent with the simulation results. The flashover voltage on the surface of silicon rubber decreases with the decrease of the FD of droplets, indicating that the complexity of droplet distribution has a significant effect on the flashover voltage. INDEX TERMS Droplet elongation, flashover voltage, discrete droplet, sir composite, fractal dimension.

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Hydrophobicity Grade Detection of Polymeric Insulator Using Image Visibility Graph

Roy

Paramane

Singh

et al. 2022

2022 IEEE 6th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)

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Influence of viscosity and conductivity of water droplets on partial discharge inception voltages of polymeric insulating surfaces

Cited by 9 publications

References 4 publications

Dynamic formation mechanism of water droplet and induced surface discharges on silicone rubber composites

Dynamic formation mechanism of water droplet and induced surface discharges on silicone rubber composites

Dynamic Behavior of Droplets and Flashover Characteristics for CFD and Experimental Analysis on SiR Composites

Hydrophobicity Grade Detection of Polymeric Insulator Using Image Visibility Graph

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