Improvement of surface flashover characteristics about 45° insulator configuration in vacuum by a new organic insulation structure

Huang, Qifeng; Li, Shengtao; Zhang, Tuo; Ni, Fengyan; Li, Jianying

doi:10.1109/tdei.2011.6118652

Cited by 19 publications

(8 citation statements)

References 15 publications

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“…[122][123][124][125][126][127][128][129][130][131][132][133] This is an open access article published by the IET and CEPRI under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) insulation system. Functionally graded insulation system can suppress the electron emission, and succeed in improving surface flashover performance in vacuum [15][16][17][18][19][20]. A schematic diagram of the multilayer functionally graded insulation system is shown in Fig.…”

Section: Functionally Graded Insulator Systemmentioning

confidence: 99%

“…The electric field distortion in the partial region of the insulation material is closely related to the shape of the insulation material, the shape of the electrode and their contact status. Based on the above, the initial researches started with different shapes of insulation material [20][21][22][23], and developed to the researches of contact angles between insulation materials and electrodes [23][24][25][26]. Studies have shown that the contact angles for different materials to achieve optimal surface flashover performance in vacuum were not the same.…”

Section: ° Insulation Systemmentioning

confidence: 99%

“…Therefore, it is very significant to suppress the electric field strength at ATJ for preventing the surface flashover in vacuum. Based on the polyethylene functionally graded insulation systems, authors proposed the 45° three-layer system to reduce the electric field at ATJ by controlling the permittivity of the inserted layer [20]. For the three-layer 45° insulation system, the simulation calculation on the electric field distribution under ideal conditions is shown in Fig.…”

Section: ° Insulation Systemmentioning

confidence: 99%

“…Authors have done a lot of researches on the insulation system optimisation to reduce the electric field distortion at the triple junction by using the functionally graded insulation system. Functionally graded insulation system can suppress the electron emission, and succeed in improving surface flashover performance in vacuum [15–20]. A schematic diagram of the multilayer functionally graded insulation system is shown in Fig.…”

Section: Insulation System Optimisationmentioning

confidence: 99%

“…Fig 5. Electric field distribution of the standard and three-layer models[20] (a) Standard model, (b) Three-layer model (layer A: 5 mm; layer B: 1 mm)…”

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Improvement of surface flashover in vacuum

2020

High Voltage

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Surface flashover of insulation systems is a basic issue in the field of high voltage and electrical insulation. To improve the surface flashover performance is of great significance for the development of advanced power transmission equipment and insulation materials. This study reviews the research progress of surface flashover in vacuum regarding to effective methods to improve the surface flashover performance in vacuum, including insulation system optimisation and material modification. The former one is beneficial to reduce the electric field distortion, and the later one is able to adjust the surface trap parameters of the material through physical and chemical methods. In addition, the 'U-shaped' curve is proposed to reveal the relationship between surface flashover voltage and surface trap level, discovering the synthetic effects of surface traps on surface flashover. It is expected that the 'U-shaped' curve will become a guidance to improve surface flashover performance through adjusting trap parameters. Moreover, several suggestions are made to build unified surface flashover model which is suitable to the range from high vacuum to high pressure.

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Section: Functionally Graded Insulator Systemmentioning

confidence: 99%

Section: ° Insulation Systemmentioning

confidence: 99%

Section: ° Insulation Systemmentioning

confidence: 99%

Section: Insulation System Optimisationmentioning

confidence: 99%

“…Fig 5. Electric field distribution of the standard and three-layer models[20] (a) Standard model, (b) Three-layer model (layer A: 5 mm; layer B: 1 mm)…”

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confidence: 99%

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