IMPROVEMENT OF THE CONVERTER UNIT OF POWER SUPPLY SYSTEM WITH A PHOTOVOLTAIC SOLAR BATTERY

Abstract

Improving of the converter unit for the power supply system with a photovoltaic solar battery by reducing power losses and eliminating transient components of the current when the operating mode changes. Synthesis of structure of the converter control system based on the analysis of processes in electrical circuits taking into account voltage changes, energy losses in semiconductor switches and using computer simulation. The possibility of reducing energy losses in the keys of the converter unit and improving the harmonic composition of the output current of the grid inverter has been substantiated; the structure of the converter control system has been developed with voltage regulation at the input of the grid inverter and switching from work in parallel with the grid to the autonomous mode and vice versa; a computer model of the system “converter unit with solar battery, grid and load” with a unit for determining energy losses in keys of circuit  was developed. Improved: the structure of the control system of the converter unit with voltage regulation in the DC link; the structure of the generator with the combination of the function of phase-locked loop. The dependence of the voltage value at the input of the grid inverter is obtained according to the grid voltage, provided that the current quality is maintained at the grid connection point.