Computer investigation and verification of the operation of a single-phase on-grid inverter with hysteresis-current control

The paper presents study of a single-phase on-grid inverter with hysteresis-current control. The control system monitors the output current of the full bridge inverter´s schema which is connected to the grid through LCL filter. The study is made through two software products - MATLAB/SIMULINK and PSIM. A comparison of the simulation results obtained by the two software products is made. The harmonic spectrums of the voltage of the point of common coupling (PCC) and the current from / to the grid are studied. Experimental results are also put. The computer simulation and the experimental study are made for two cases - first, the load current is equal to the inverter´s current, and, second, the load current is twice as bigger as the inverter´s current.