Analysis of Harmonic Characteristics of Inverters and Rectifiers

The grid-side current harmonic characteristics of photovoltaic grid-connected inverters and three-phase voltage-type rectifiers based on different modulation methods are studied. Impact. Considering the influence of dead zone effect on output voltage waveform, under different dead zone time, the influence of dead zone on harmonics is analyzed, and the harmonic generation mechanism of dead zone effect is theoretically explained. Finally, the simulation model of inverter and rectifier is built in MATLAB/Simulink environment, and the theoretical analysis results are verified by Fast Fourier Transform.