Streamer and surface charge dynamics in non-uniform air gaps with a dielectric barrier

Meyer, Hans Kristian Hygen; Mauseth, Frank; Marskar, Robert; Pedersen, Atle; Blaszczyk, Andreas

doi:10.1109/tdei.2019.007929

Cited by 31 publications

(34 citation statements)

References 20 publications

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“…With both surface types, the simulated surface charge distributions after streamer propagation are close to the defined saturation charge [19,38]. This is illustrated in figure 11.…”

Section: Streamer Surface Chargingsupporting

confidence: 54%

Streamer propagation along a profiled dielectric surface

Meyer

Marskar

Gjemdal

et al. 2020

Plasma Sources Sci. Technol.

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We investigate the propagation of positive streamers along a profiled dielectric surface in air at atmospheric pressure. Results from experiments and two-dimensional planar low-temperature plasma fluid simulations are presented and analysed. The test object consists of a disk-shaped high voltage electrode and a dielectric slab with 0.5 mm deep corrugations. The corrugated surface has a 47% larger surface area than the smooth reference surface. The experiments and simulations are performed at voltage levels that lead to either gap-bridging or arrested streamers. In both experiments and simulations, the streamers take a longer time to reach the ground electrode when propagating along the profiled surface than along the smooth reference surface. Also, arrested streamers stop closer to the high voltage electrode when a profiled surface is used. Streamers propagate closely along the surface profile in the simulations, which suggests that the observed surface profile effect is mainly a result of elongated streamer channels. Compared to the streamers propagating along the smooth surface, the elongated streamers on the profiled surface have less residual voltage at the streamer front to drive the streamer advancement.

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“…With both surface types, the simulated surface charge distributions after streamer propagation are close to the defined saturation charge [19,38]. This is illustrated in figure 11.…”

Section: Streamer Surface Chargingsupporting

confidence: 54%

Streamer propagation along a profiled dielectric surface

Meyer

Marskar

Gjemdal

et al. 2020

Plasma Sources Sci. Technol.

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“…Dielectrics not only distort nearby electric fields but also serve as a possible electron sink or source. Dielectrics can therefore play a critical role in the formation and propagation of discharges [1]. We have recently explored the interaction between positive streamers and dielectrics in [2].…”

Section: Introductionmentioning

confidence: 99%

A computational study of negative surface discharges: Characteristics of surface streamers and surface charges

Li¹,

Sun²,

Teunissen³

2020

IEEE Trans. Dielect. Electr. Insul.

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We investigate the dynamics of negative surface discharges in air through numerical simulations with a 2D fluid model. A geometry consisting of a flat dielectric embedded between parallel-plate electrodes is used. Compared to negative streamers in bulk gas, negative surface streamers are observed to have a higher electron density, a higher electric field and higher propagation velocity. On the other hand, their maximum electric field and velocity are lower than for positive surface streamers. In our simulations, negative surface streamers are slower for larger relative permittivity. Negative charge accumulates on a dielectric surface when a negative streamer propagates along it, which can lead to a high electric field inside the dielectric. If we initially put negative surface charge on the dielectric, the growth of negative surface discharges is delayed or inhibited. Positive surface charge has the opposite effect.

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“…The streamer discharge would lose much energy at the shed due to the low tangential electric field and the charges in the streamer attaching to the shed [ 23 , 24 , 25 , 26 ]. The method in the literature [ 15 ] was used to estimate the energy loss at the shed.…”

Section: Discussionmentioning

confidence: 99%

Streamer Propagation along the Insulator with the Different Curved Profiles of the Shed

et al. 2022

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The flashover along the insulator endangers the reliable operation of the electrical power system. The reasonable curved profiles of the shed could improve the flashover voltage, which would reduce power system outages. The research on the influence of the curved profiles of the shed on the streamer propagation along the insulator made of polymer was presented in the paper. The streamer propagation “stability” field, path, and velocity affected by the curved profiles of the shed, were measured by ultraviolet camera, ICCD camera, and photomultipliers. The “surface” component of the streamer is stopped at the shed with the different curved profiles, while the “air” component could go round the shed and reach the cathode. The streamer propagation “stability” fields are inversely proportional to the curved profiles of the shed. The streamer propagation velocities are proportional to the curved profiles of the shed. The relationship between the streamer propagation and the flashover propagation was discussed in depth. The subsequent flashover propagation is greatly affected by the streamer propagation path and “stability” field. Furthermore, the influence of the material properties on the streamer propagation path was also discussed in depth.

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Streamer and surface charge dynamics in non-uniform air gaps with a dielectric barrier

Cited by 31 publications

References 20 publications

Streamer propagation along a profiled dielectric surface

Streamer propagation along a profiled dielectric surface

A computational study of negative surface discharges: Characteristics of surface streamers and surface charges

Streamer Propagation along the Insulator with the Different Curved Profiles of the Shed

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