study by simulation the influence of temperature on the formation of space charge in the dielectric multilayer under dc electric stress

Multidielectric polyethylene is a material that is generally employed as insulation for the hvdc isolations. in this paper, the influence of temperature on space charge dynamics has been studied, low-density polyethylene (ldpe) and fluorinated ethylene propylene (fep) sandwiched between two electrodes were subjected to voltage application of 5kv (14.3 kv/mm) for extended duration of time and the space charge measurements were taken using bipolar model is one-dimensional, taking into account trapping, detrapping and the rencommbinaison in order to determine the charge density and electric field of the sample depending on the thickness. the simulation was carried out at three different temperatures (20, 40, and 60°c). the results of this model going to compare with experimental space charge measurements . finally, simulation results demonstrated that the temperature has many effects on the dynamic space charge and of influences the charge injection, charge mobility, electrical conduction, trapping and detrapping.