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The main objective of this work was to study the characteristics of the space charge induced by nonlinear conductivity of high voltage direct current (HVDC) cable insulation under inhomogeneous field. A simplified model of 320kV HVDC cable was built and the space charge polarization and depolarization in cable insulation formed by nonlinear conductivity were studied by simulation with different temperature...
This study deals with the space charge characteristics of linear/nonlinear double-layered composites, and sets out to explore whether the space charge inside linear layer could be suppressed by the nonlinear barrier layer. The linear layer is pure low density polyethylene (LDPE) matrix. The nonlinear barrier layer is prepared by adding nano Zinc Oxide (ZnO) to LDPE with concentrations of 9.09wt%,...
Under the step voltage, the non-linear conductivity dielectrics have the function of grading the electric field. But such materials have been applied extensively under AC electric field, and insulating materials damaged mostly under impulse voltage. The research on the AC response characteristic presents the foundations for the development and application of non-linear insulation dielectrics. In this...
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