Experimental Investigation of Two-Phase Mixture Discharges Under DC Voltage From Effects of Macroparticle Sizes

Yao, W.; He, Zhenghao; Deng, Heming; Li, Jing; Ma, Jun

doi:10.1109/tps.2010.2103574

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…is comprehensive effect jointly suppresses the development of discharge and increases the breakdown voltage. erefore, the breakdown voltage in wind-sand environment with high-concentration and small-size sand particles is much higher than that with low-concentration and large-size sand particles; that is to say, the sand dust environment with high-concentration and small-size sand particles makes it more difficult to form streamer discharge and has stronger discharge suppression action and higher breakdown voltage, which is in good agreement with the experimental results of relevant scholars in [22,36].…”

Section: Simulation and Discussionsupporting

confidence: 87%

Modeling of Strong Wind-Sand Dielectric Streamer Discharge

Kang

Shi

2022

Mathematical Problems in Engineering

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Due to the complex and harsh climate environment in Northwest China, the external insulation of power lines and high-speed train are exposed to strong wind-sand environment all year round, which brings severe challenges to the external insulation design and protection of the electric systems. Based on the theories of streamer discharge, the plate-plate electrode was taken as the analysis object, and a theoretical physical model of the strong wind-sand dielectric discharge is established. In this model, the analytical expressions of electron ionization coefficient and positive ion generation coefficient in a wind-sand environment are deduced considering the combined effects of the airflow velocity, the distortion of the electric field caused by sand particles, and the electrons captured by sand particles in the discharge process; furthermore, the streamer breakdown criterion in wind-sand environment is proposed. Research results can provide an important theoretical basis for the quantitative calculation of the breakdown voltage and the external insulation protection in a strong wind-sand environment.

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Section: Simulation and Discussionsupporting

confidence: 87%

Modeling of Strong Wind-Sand Dielectric Streamer Discharge

Kang

Shi

2022

Mathematical Problems in Engineering

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“…This value, however, varies importantly as humidity [ Husain and Nema , ; Nomura et al ., ; Lee et al ., ] and pressure [ Krauss et al ., ; Burgo et al ., ] conditions change. The presence of particles in air can also depreciate the breakdown field, effectively limiting how much charge grains can collect [ Cross , ; Al‐Arainy et al ., ; Dascalescu et al ., ; Al‐Arainy , ; Deng et al ., ; Yao et al ., ]. Finally, the breakdown limit is different for different gases [ Raizer , ].…”

Section: Resultsmentioning

confidence: 99%

The effects of dynamics on the triboelectrification of volcanic ash

Harper

Dufek

2016

JGR Atmospheres

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Lightning is often observed during explosive volcanic eruptions, and the charging processes associated with these displays have been attributed to several mechanisms. In this work we delineate a set of experiments designed to quantify silicate-based triboelectric charging in the volcanic context. Using natural samples from three different volcanoes, we show that the rate of triboelectrification in a fluidized bed depends on the energy input into the granular system. Experiments are conducted employing nonintrusive electrostatic sensors, ensuring that all charge exchange arises solely from particle-particle collisions. At higher fluidization energies, particles undergo more frequent and energetic collisions, facilitating the transfer of charge. This finding implies that triboelectric charging could help promote charging in regions of the eruptive system that contain numerous particle-particle collisions such as the conduit and gas thrust regions. Our experiments also suggest that surface charge density is capped, at least in part, by atmospheric conditions, specifically the breakdown characteristics of the gas.

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“…Furthermore, the effect of particle size on the discharge path under lightning impulses as well as the effect on two-phase mixture (a mixture of gas and macroparticles of high concentration) discharges under DC voltage were studied by researchers from Huazhong University of Science and Technology [31,32]. Their work laid the foundation for future research into the influence of fog and haze on the air gap insulation strength.…”

Section: Overview Of Research Into External Insulation In Fog-haze Wementioning

confidence: 99%

Experimental study on the contamination deposition characteristics of insulators in a fog–haze environment

Zhang

et al. 2017

IET Generation, Transmission & Distribution

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Experimental Investigation of Two-Phase Mixture Discharges Under DC Voltage From Effects of Macroparticle Sizes

Cited by 11 publications

References 20 publications

Modeling of Strong Wind-Sand Dielectric Streamer Discharge

Modeling of Strong Wind-Sand Dielectric Streamer Discharge

The effects of dynamics on the triboelectrification of volcanic ash

Experimental study on the contamination deposition characteristics of insulators in a fog–haze environment

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