Modeling of Single-Phase Grid-Connected using MATLAB/Simulink Software

This paper present the design and analysis of single-phase grid-connected system by using MATLAB/Simulink software. The main outlines on this paper is the implemented of DC/DC Flyback converter with the proportional integral with (PI) controller, single-phase full-bridge inverter with sinusoidal pulse width modulation (SPWM) switching technique and phase lock-loop (PLL). Initially, all necessary parameters are clearly calculated and the system integration is then by using MATLAB/Simulink software. The results shows that the able to synchronize with grid system which matching frequency and amplitude. In addition, with appropriate design of LC low pass filter, the total harmonic distortion (THD) in the output ac voltage is significantly reduced from 52.45 % to 1.82 %. The design parameter, operating principles, switching techniques of each subsystem are discussed in detail.