PROJECT TITLE :

Space charge modeling in polymers: review of external applied constraints effects

ABSTRACT:

The aim of this work is to describe, with numerical simulation, the area charge behavior in polymeric materials. Explicit intent is accorded to the variation of the thermo-electrical constraints. The simulation is performed for a range of the electrical field from ten to a hundred and ten MV/m and also the space charge behavior was described at numerous temperatures: zero, twenty seven, sixty and a hundred ° C. In general, the numerical results show a predominance of the temperature result, vs. the electrical field, on the area charge behavior. The dynamic of the electrical charges is completely different underneath one hundred ° C, a forehead is observed on their distribution within the sample. Robust electrical field enhancements are remarked within the dielectric, they exceed 38p.c of the applied field below a hundred ° C. Only 1.threepercent of augmentations are observed beneath space temperature even with higher applied field of one hundred ten MV/m. Both experimental and theoretical Current-Field characteristics, plotted in log-log scale, show linear behavior with slopes bigger than one. The various values of slope indicate space charge restricted conduction; a change is remarked at 40 MV/m that will defines the start of the high fields regime within the case of the studied polymer (Polyethylene Naphthalate).