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Composite Material
Electric Field
Polyethylene
Simulation Technique
Triple Junction
Carbon Black
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New Organic Insulation System to Improve the Surface-Flashover Characteristics in Vacuum
New Organic Insulation System to Improve the Surface-Flashover Characteristics in Vacuum,10.1109/TPS.2010.2080288,IEEE Transactions on Plasma Science,
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New Organic Insulation System to Improve the Surface-Flashover Characteristics in Vacuum
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Shengtao Li
,
Qifeng Huang
,
Tuo Zhang
,
Fengyan Ni
,
Jianying Li
In this paper, a new organic insulation system is proposed to improve the surface-flashover performance in vacuum by inserting permittivity-gradient multilayer organic
composite material
between the electrode and the dielectric.
Simulation technique
was used to calculate and analyze the electric-field distribution of this new insulation system. The result shows that the electric-field strength at the vacuum-insulator-electrode
triple junction
decreases significantly by optimizing the permittivity and conductivity of the inserted layer. On the basis of this analysis, a new improved system of
polyethylene
composite material-polyethylene-polyethylene
composite material
was prepared and studied. The permittivity and conductivity of the
composite material
are controlled by the additive content in the
carbon black
semiconductive master batch. Moreover, it is indicated in our result that by properly adjusting the permittivity and conductivity through additive content, the surface-flashover performance in vacuum can be greatly improved. The highest first flashover voltage reaches 91 kV and increases by 75% compared with that of the
polyethylene
standard samples. It is also confirmed that by decreasing the electric-field strength at the vacuum-insulator-cathode triple junction, the vacuum surface-flashover performance can be improved significantly.
Journal:
IEEE Transactions on Plasma Science - IEEE TRANS PLASMA SCI
, vol. 38, no. 12, pp. 3434-3441, 2010
DOI:
10.1109/TPS.2010.2080288
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