REGULARITIES OF CHANGES IN THE ENERGY EFFICIENCY OF THE SUPERCAPACITOR DISCHARGE TO LINEAR ACTIVE LOAD WHEN THE DURATION OF THE DISCHARGE CHANGES

Abstract

In the paper, the regularities of changes in electricity losses and the coefficient of its transfer to a linear active load during the discharge of a supercapacitor on the load under different conditions of interruption of discharge currents are determined. The influence of the conditions of interruption of discharge currents of the supercapacitor on the energy characteristics of the discharge circuit is determined, taking into account the fact that the capacity of the supercapacitor is a function of the voltage at its terminals. It was taken into account that this voltage can change its polarity. A mathematical model was developed that takes into account that the discharge process can be both aperiodic and oscillatory. The model was implemented in the Mat-lab/Simulink software package. A comparison of the energy characteristics during the discharge of a supercapacitor and a conventional linear capacitor on the same linear load at the same initial voltage on these capacitors was carried out. It has been established that the energy delivered to the load during the discharge of a supercapacitor is 1.8 times greater than dur-ing the discharge of a conventional linear capacitor charged to the same voltage, but the efficiency of energy transfer for these processes is almost the same. However, when the discharges of a supercapacitor and a conventional linear capacitor are forcibly interrupted, the efficiency of energy transfer to the load increases, and the efficiency during the discharge of the supercapacitor is always higher. Bibl. 14, fig. 3, tables 2. Key words: supercapacitor, capacitor, discharge, linear load, electricity losses, energy transfer efficiency.