Single-Phase Grid-Connected Inverter Simulation

We conducted comprehensive research on single-phase grid-connected inverter simulation. Through the implementation of grid-tied single-phase inverters, we gained deeper insights into inverter operational principles and their applications in power grid systems. The grid synchronization process requires careful consideration of critical factors such as voltage and frequency stability, along with grid feedback mechanisms for the inverter. Our implementation involved MATLAB/Simulink models featuring Phase-Locked Loop (PLL) algorithms for grid synchronization, SPWM (Sinusoidal Pulse Width Modulation) techniques for switching control, and PI controllers for DC-link voltage regulation. We performed extensive testing and optimization across multiple parameters to ensure inverter stability and reliability within the grid environment. This included harmonic analysis using FFT algorithms, power quality assessment, and dynamic response testing under varying load conditions. Ultimately, we derived valuable conclusions and proposed enhancement measures, including advanced current control strategies and improved maximum power point tracking (MPPT) algorithms, to further optimize the efficiency and performance of single-phase grid-connected inverters.