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


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).

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