Input of optimization techniques for implementing charge transport models in electrical insulation

This work aims at systematizing the determination of physical parameters pertaining to charge transport models for dielectrics through the use of a method based on Levenberg-Marquardt algorithm. Experimental data used are net density of charge as measured by the pulsed electro-acoustic method - PEA - and external charging and discharging current measurements. Simulated data are those produced by a bipolar charge transport model developed for low density polyethylene under dc stress. We show that the optimization tool developed as an interface between the numerical model and the experimental data can readily produce a set of values of physical parameters for the model.