Title :
A field-dependent injection-dissociation model for electrical conduction in nonpolar liquids
Author :
Pontiga, F. ; Castellanos, A.
Author_Institution :
Dept. de Electron. y Electromagn., Seville Univ., Spain
Abstract :
The conduction of dielectric liquids has been studied with a model that includes both the generation of charge carriers in the bulk and at the electrodes. Onsager´s theory is applied to the dissociation of ionic pairs in the bulk. On the other hand, the injection of ions from the electrodes is described with a field dependent injection law. Recombination is allowed between electrolytic ions and injected ions. The electrical equations have been numerically integrated with a finite difference technique. The contribution of the dissociation and injection to the total current density has been discussed for several values of the relevant parameters. A procedure is also given to determine the experimental injected charge density from the measurement of the current-voltage characteristic
Keywords :
current density; dielectric liquids; dissociation; finite difference methods; insulating oils; ion recombination; ionic conductivity; Onsager´s theory; charge carriers generation; current-voltage characteristic measurement; dielectric liquids; electrical conduction; electrical equations; electrodes; electrolytic ions; field dependent injection law; field-dependent injection-dissociation model; finite difference technique; injected charge density; injected ions; ion injection; ion recombination; ionic pairs dissociation; nonpolar liquids; total current density; Charge carriers; Charge measurement; Current density; Current measurement; Current-voltage characteristics; Density measurement; Dielectric liquids; Difference equations; Electrodes; Finite difference methods;
Conference_Titel :
Industry Applications Society Annual Meeting, 1994., Conference Record of the 1994 IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-1993-1
DOI :
10.1109/IAS.1994.377648
