MATLAB Simulation Model for Grid-Connected Inverter Based on Proportional-Resonant Control

The grid-connected inverter based on proportional-resonant control is a widely used power electronic device that converts direct current (DC) to alternating current (AC) and injects it into the power grid. The MATLAB simulation model of this device helps engineers better understand its working principles through detailed implementation of control algorithms including the proportional-resonant (PR) controller design, which provides zero steady-state error at fundamental frequency and excellent harmonic rejection capabilities. The simulation model can simulate device performance under various grid conditions, including grid voltage variations, frequency fluctuations, and harmonic distortions, making it suitable for optimizing design parameters such as controller gains, filter components, and switching frequencies. The model typically includes key MATLAB functions for implementing Clarke/Park transformations for grid synchronization, PR controller blocks with frequency-adaptive capabilities, and space vector PWM generation algorithms for precise voltage control. Additionally, this MATLAB simulation model serves as an excellent educational tool in training environments, helping students understand the operational principles and applications of grid-connected inverters through hands-on simulation experiments that demonstrate real-time control performance, stability analysis, and system response under different operating scenarios.