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Epoxy resin as a typical electrical insulation material has been widely applied in the power equipment. However, the electrical properties of epoxy resin are strongly affected by the surface charge accumulation. One way to solve the surface charge accumulation may be to use the nonlinear resistive field grading nanocomposites. In this paper, we aim to study the effect of ZnO nanoparticles on the surface...
Compared with breakdown strength of insulating material used in power equipments, insulator employed in power system is easy suffered from surface flashover in vacuum. So, surface flashover has become a mainly restricted factor for developing high voltage and efficiency power equipments in vacuum. Although many works have been done to investigate the characteristics of surface flashover in vacuum,...
Basing on the range theory of European Space Agency (ESA) and Touzin's charge deposition theories, a 1-D internal charging model has been employed in simulating the effects of incident electron flux (IEF) and irradiation time on deep dielectric charging (DDC). It is calculated that the distribution of electric field, conductivity and space charge under both different IEF and time. The results indicate...
Some insulating structures of Mo/Al2O3 cermet - Al2O3 ceramic - Mo/Al2O3 cermet were prepared to improve surface flashover performance in vacuum through co-firing, where the volume amount of Mo was managed from 2 to 50 vol% and there could exist one or two layers with different Mo amount in Mo/Al2O3 cermet. The influences of Mo amount of Mo/Al2O3 cermet on the surface flashover voltage in vacuum of...
In this paper, A-B-A insulators were designed to improve the characteristics of surface flashover in vacuum by adjusting conductivity and permittivity of layer A. According to electric field theory of series dielectrics, the DC and pulsed field distributions of the insulators were calculated and the influences of conductivity and permittivity of Layer A on the electric field of vacuum-insulator-cathode...
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