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A modified method is proposed to directly determine the trap energy distribution in dielectrics after high electric field charge injection based on thermally stimulated current (TSC) measurement. Firstly, through a series of equation derivation, it is found that obtaining trap energy distribution from measured TSC data becomes solving a nonnegative least squares problem. Then, an iteration algorithm...
Space charge accumulation causes electric field distortion and affects the insulation aging. It is an interesting phenomenon that space charge behavior is influenced by the contact interface even between two insulations of the same materials (with the same conductivity and dielectric constant). To study such effect, a simple case was studied. Two low-density polyethylene (LDPE) plates were made by...
In this paper, the effect of nano-additive grain size on trap density distribution in low-density polyethylene (LDPE) and LDPE/silica nanocomposites was investigated with depolarization current. The concentration of hydrophobic nanosilica was from 1.0 to 5.0 wt% and the average particle size was 7 nm and 16 nm, respectively. The depolarization current of pure LDPE acquired from 0.1 to 3600 s is associated...
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