Voltage Feedforward Current Control for Single-Phase Inverters in Photovoltaic Grid-Connected Systems

Voltage feedforward current control for single-phase inverters in photovoltaic grid-connected systems is a widely adopted control method in solar power generation systems. This control approach, implemented in MATLAB 7.3, achieves efficient and stable operation of photovoltaic grid-connected systems under various conditions through precise calculation of voltage feedforward currents. The implementation typically involves using MATLAB's Simulink environment to model the control system, where key functions include grid voltage sampling, current reference generation, and PI controller tuning for accurate current tracking. Besides voltage feedforward current control, several other control methods can be applied to photovoltaic grid-connected systems, such as power control and direct current control strategies. While each control method has its specific advantages and application scenarios, voltage feedforward current control remains one of the most commonly used and effective approaches in many practical situations due to its ability to compensate for grid voltage disturbances and improve system dynamic response. The algorithm typically incorporates real-time grid voltage measurement to anticipate and counteract potential instability factors, ensuring robust performance even during grid voltage fluctuations.