MATLAB Model of a Photovoltaic Inverter with Dual-Loop Control

This article presents a MATLAB model of a photovoltaic inverter utilizing dual-loop control strategy. A photovoltaic inverter is a power conversion device that transforms solar energy into alternating current (AC), converting the direct current (DC) generated by solar panels into usable AC power for residential, commercial, and industrial applications. The dual-loop control represents an advanced control technique that enhances inverter stability and precision. Specifically, the model implements two feedback loops: an inner current control loop and an outer voltage control loop. In MATLAB implementation, the current loop typically uses fast-response PI controllers to regulate instantaneous current values, while the voltage loop maintains stable output voltage through slower-acting PI controllers. This control architecture ensures stable and precise AC output from the inverter, thereby improving the efficiency and reliability of solar panel systems. The MATLAB model includes essential protection features such as overcurrent protection algorithms that monitor current thresholds and short-circuit protection mechanisms that implement fault detection routines. From a coding perspective, the model likely utilizes Simulink blocks for power electronics components (IGBT/MOSFET switches, LC filters) and control system工具箱 for implementing the PI controllers with anti-windup features. The simulation probably includes maximum power point tracking (MPPT) algorithms to optimize solar energy harvesting. Overall, this MATLAB model serves as a valuable tool for engineers to design and optimize photovoltaic inverter performance through comprehensive simulation and control system analysis.