Significantly suppressing metal particle-induced surface charge accumulation of spacers in DC gas-insulated power transmission lines

Xing, Yunqi; Sun, Xinbo; Jiang, Jinpeng; Liang, Fangwei; Liang, Zuodong; Zhuang, Weijian; Liu, Bo; Li, Dege; Cao, Shaohua; Li, Min; He, Jinliang; Li, Chuanyang

doi:10.1088/1361-6463/ac9ce6

Cited by 15 publications

(7 citation statements)

References 30 publications

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“…Liu and others set up particle traps near the spacer to form a region of low electric field, which can inhibit the accumulation of particle charges, thereby reducing the kinetic energy of particle motion [17]. Our preliminary research found that slightly increasing the surface conductivity can increase the particle's take-off voltage and inhibit the particle's range of motion [15].…”

Section: Introductionmentioning

confidence: 92%

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Particle behavior and trap design for ±320 kV gas-insulated power transmission line (GIL)

Zhuang

Liang

et al. 2023

J. Phys. D: Appl. Phys.

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The movement of metal particles in the electric field of the DC gas-insulated transmission line (GIL) may cause local electric field distortion on the surface of the insulator, which seriously affects the operation stability of GIL. In this paper, based on a ±320 kV GIL platform, the movement characteristics of metal particles (aluminum blocks, aluminum wires, aluminum balls) inside the GIL are studied. The suppression effect of particle activity for particle trapping and surface coating are experimentally studied in DC electric field. The relationship between particle trap porosity and particle suppression effect are discussed and verified with experiments. The research results show that under negative voltage, the minimum take-off voltage of metal particles in ±320 kV GIL is -190 kV, which is far lower than the steady-state operating voltage of GIL. Once the spherical and blocky particles take off, they will continue to reciprocate rapidly between the conductors. When the block particles are close to the insulator, they might be attracted and adsorbed on the surface of the insulator. Metal wires after taking off tends to show “firefly" movement near the high-voltage conductor. The coating has a significant effect on increasing the take-off electric field of metal particles. It is verified that the traditional AC GIL particle trap is not effective in inhibiting particles in DC voltage. The suppression of the DC GIL particle is positively related to the porosity of the particle trap to a certain extent. The conclusions of this paper can be reference for the development of future stable and reliable DC gas-insulated equipment.

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Section: Introductionmentioning

confidence: 92%

“…In the previous study, the movement of spherical and linear metal particles on the surface of basin-type spacer through the scaled GIL model were studied. And the surface charge characterization of basintype spacer during the movement of spherical and linear metal particles under DC voltage was revealed by using the dust method [14,15].…”

Section: Introductionmentioning

confidence: 99%

Particle behavior and trap design for ±320 kV gas-insulated power transmission line (GIL)

Zhuang

Liang

et al. 2023

J. Phys. D: Appl. Phys.

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“…Previous studies have shown that these theories can be consistent with experiments under specific circumstances. Therefore, Zhan et al [143] , Liu et al [144,145] , and Li et al [146] have conducted some research on the structural optimization design of the particle collector. They analyzed the capture efficiency of different structure under DC voltage, and appropriately improved the corresponding size parameters.…”

Section: Gρ Amentioning

confidence: 99%

China's 10-year progress in DC gas-insulated equipment: From basic research to industry perspective

Zhang

et al. 2022

iEnergy

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The construction of the future energy structure of China under the 2050 carbon-neutral vision requires compact direct current (DC) gas-insulation equipment as important nodes and solutions to support electric power transmission and distribution of long-distance and large-capacity. This paper reviews China's 10-year progress in DC gas-insulated equipment. Important progresses in basic research and industry perspective are presented, with related scientific issues and technical bottlenecks being discussed. The progress in DC gas-insulated equipment worldwide (Europe, Japan, America) is also reported briefly.

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“…Dielectric barrier discharges (DBDs) have attracted considerable attention from both academic and industrial communities due to their versatile applications, such as surface treatment [1,2], high-voltage engineering [3,4], plasmaassisted combustion [5], and plasma-enhanced catalysis [6,7]. Extensive studies have investigated various key parameters, such as excited species [8,9], electric fields [10,11], and electron behavior [12], during the volumetric process of DBDs.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of transient surface charging during dielectric barrier discharges in air gap in needle-to-plane geometry

Yang

Wang

et al. 2023

J. Phys. D: Appl. Phys.

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Motivated by a deeper understanding of plasma-surface interactions, this study presents experimental investigations into the transient surface charging process during dielectric barrier discharges (DBDs) in an air gap in a needle-to-plane geometry based on a combination of the Pockels method and a custom-designed ultrafast multi-frame imaging system. We realized three-frame observations of transient surface charge distributions, with a remarkable temporal resolution of 3 ns, during positive primary discharges and negative reverse discharges when applying a positive square-wave pulse. During the positive primary discharges at the rising voltage front, following the circular expansion of the streamer over the surface, multiple streamer filaments bifurcate simultaneously from the center, resulting in a branched positive surface charge distribution. Gradient surface charge densities are observed along the channel with higher charge densities at the head, which gradually evolve into a uniform distribution along the channel as the streamers approach stagnation. No lateral expansion of positive charges is observed across the channel under the present condition. In the case of negative reverse discharges occurring at the falling edge of the voltage pulse, the neutralization of residual positive surface charges and the accumulation of negative surface charges occur simultaneously in the central region. The deposited negative surface charges exhibit a progressively expanding circular distribution characterized by increasing charge density and radius. The propagation dynamics of surface streamers and the fields induced by surface charges are investigated and discussed based on the spatio-temporal surface charge measurements. Further study suggests that the surface streamer is not driven by the over-accumulation of surface charges, but rather by the space charge field above the dielectric. The presented quantitative measurements can be used for detailed validation of DBD simulations and offer deeper insights into plasma-surface interactions.

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Significantly suppressing metal particle-induced surface charge accumulation of spacers in DC gas-insulated power transmission lines

Cited by 15 publications

References 30 publications

Particle behavior and trap design for ±320 kV gas-insulated power transmission line (GIL)

Particle behavior and trap design for ±320 kV gas-insulated power transmission line (GIL)

China's 10-year progress in DC gas-insulated equipment: From basic research to industry perspective

Experimental study of transient surface charging during dielectric barrier discharges in air gap in needle-to-plane geometry

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