METHOD OF COMPENSATION OF PEAK LOAD CURRENTS BASED ON SUPERCAPACITORS

Abstract

The method of compensation of peak load currents based on supercapacitors is a modern approach to solving the problem of stabilizing energy consumption in electrical networks, in particular under conditions of dynamic load changes. This method has wide application in electrical engineering, in particular in electric transport systems, renewable energy sources, as well as in industrial and household electrical networks.
Supercapacitors are a suitable replacement for batteries in energy storage systems where high power density is required repeatedly. Compared to batteries, supercapacitors have lower energy density and higher power density. Therefore, they can be used in many applications for managing energy storage, especially where power bursts are required for a short period of time.
The use of supercapacitors requires the use of power electronic converters to ensure their efficient control. The power converter connects the supercapacitors to the DC bus of the drive. It is controlled according to the system requirements, namely, regulating the DC bus voltage, monitoring the state of charge of the supercapacitors, or distributing active energy between the drive and the ultracapacitors.
The article presents a simulation model of an autonomous power supply system in the Matlab/Simulink environment. The obtained graphs of the powers generated by photovoltaic modules and consumed by the load. In the absence of a peak load current with an amplitude of I_PV_max=30.29 A, the power generated by photovoltaic modules is P_Vmax=820.4 W..
For simulation modeling of peak load currents, a controlled current source unit and a rectangular pulse generator are connected in parallel with the load resistance. The increase in the minimum power that is allocated to the load when the peak load current with an amplitude of I_PV_max=30.29 A is ∆P_Lmin=543.4 W.