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Initial conditions of surface charge accumulation under impulse voltage
Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2003The surface charge distributions under impulse voltage are measured. Two types of insulators are investigated. The influence of impulse voltage magnitude on the surface charge accumulation is studied. It is shown that the pre-discharge current has a neutralization effect on charge accumulation, which makes the surface charging very weak when the ...
F. Wang +4 more
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Suppression of Surface Charge Accumulation on Rough RTV Silicone Rubber
2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2020The room temperature vulcanized silicone rubber has been widely used in the electric transmission line. However, the accumulated surface charge leads to the flashover, and degradation limits its development. In this paper, room temperature vulcanized silicone rubbers with a rough surface are prepared via a polymer emulsion template method.
Wenjie Xu +4 more
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Temporal behavior of surface charge accumulation in bridged vacuum gaps
IEEE Transactions on Dielectrics and Electrical Insulation, 1995Temporal change in electric field strength at the insulator-cathode-vacuum interface accompanied by charging of the insulator have been studied by using a two-dimensional Monte Carlo simulation. The study employed cylindrical and conical insulators. Each of the insulators was made of PMMA, polyimide or Al/sub 2/O/sub 3/.
O. Yamamoto +3 more
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Surface charge decay characteristics of epoxy spacer under space charge accumulation
Journal of Physics D: Applied PhysicsAbstract Under DC voltage, space charge inevitably accumulates within the spacer, thereby influencing the dissipation of surface charges. In this study, a charge measurement platform for epoxy resin spacers is constructed. The temporal variation of the surface charge distribution under space charges is compared. The results indicate that
Fangwei Liang +6 more
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Depletion of surface accumulation charge in InN by anodic oxidation
Journal of Applied Physics, 2009Si-doped InN layer by molecular beam epitaxy was subjected to anodic oxidation in 0.1 M potassium hydroxide (KOH) electrolyte and characterized by electrochemical methods to derive carrier profile at the InN surface. The obtained results were compared to the characteristics of a planar resistor structure and vertical metal-oxide-semiconductor (MOS ...
A. Denisenko +6 more
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Study on Surface Charge Accumulation Mechanism of DC-GIL Insulator Based on Charge Behavior
2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2020Surface charge accumulation on insulator is one of the main restrictive factors of DC gas insulated pipeline transmission line (DC-GIL). The current research has been a great concern to volume and surface conductance while the trap effect always been neglected.
Qiuye Li +5 more
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Surface charge accumulation and decay on directfluorinated oil-impregnated paper
IEEE Transactions on Dielectrics and Electrical Insulation, 2016The oil-impregnated paper, as a vital part in the oil-paper insulation system, serves as the main insulation medium in converter transformer suffering various electric fields. However, the accumulated surface charge on the paper would accelerate the degradation of insulation system and may lead to surface flashover.
B. X. Du, X. L. Li, J. P. Jiang
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Surface Charge Accumulation of Epoxy/Al2O3 Nanocomposites under Magnetic Field
2018 IEEE 2nd International Conference on Dielectrics (ICD), 2018Epoxy/Al 2 O 3 nanocomposites (EP/Al 2 O 3 ) have been used as insulating material of electrical equipment. However, charges accumulated on the surface of EP/Al 2 O 3 are regarded as a weakness point that may cause flashover and insulation failure. Accordingly, the understanding of surface charge dynamics is helpful for the safety of the insulation ...
Z.Y. Li +4 more
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Optimization design of shielding ring for restraining surface charge accumulation
2010 IEEE International Power Modulator and High Voltage Conference, 2010The surface of insulators in the GIL is prone to generate charges under a DC high-voltage for a long time, which has a great impact on insulation performance of the insulators. The accumulation of the surface charges is mainly related to surface normal field on insulators.
Gui-xin Zhang, Bei Wang, Qiang Wang
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IEEE Transactions on Dielectrics and Electrical Insulation, 2018
Surface charges have the effect of changing the electric field over spacers in compressed gases, which may affect the stable operation of gas insulated equipment and could possibly trigger a catastrophic surface flashover without warning. In this paper, we review the literature on surface charge accumulation and related surface flashover phenomenon on ...
Chuanyang Li +6 more
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Surface charges have the effect of changing the electric field over spacers in compressed gases, which may affect the stable operation of gas insulated equipment and could possibly trigger a catastrophic surface flashover without warning. In this paper, we review the literature on surface charge accumulation and related surface flashover phenomenon on ...
Chuanyang Li +6 more
openaire +1 more source