PUBLICATIONS

In this paper, dynamic simulation of the equivalent circuit model of the supercapacitor, taking into account the parameter variations

and self-discharge, is discussed. Self-discharge is modeled with equivalent impedance including a constant phase element (CPE), and

the parameter variations depending on the voltage are reflected. Since it is difficult to directly simulate the ZARC element (R-CPE

parallel circuit) with a circuit simulation tool such as the professional simulation program with integrated circuit emphasis (PSPICE),

equivalent transformation to three R-C parallel circuits is introduced in the simulation. The accuracy of simulation with the model is

then verified through a comparison with results of an experiment. The comparison shows that the model using a CPE is effective in

representing the dynamic characteristics and self-discharge of supercapacitors. Accordingly, it proves that the method proposed in

this study can be useful in developing systems that include supercapacitors, and can be applied in an integrated simulation of a

supercapacitor and a power electronic system.