Grid-Connected Doubly-Fed Induction Generator (DFIG) Simulink Model with Random Wind Speed

This paper presents a Simulink-based model for grid-connected doubly-fed induction generators (DFIG) operating under random wind speed conditions. The model implements wind turbine output simulation across varying wind speeds while accounting for wind speed fluctuations. We provide detailed explanations of the model's design principles and implementation process, including key Simulink blocks such as the wind turbine aerodynamic model, DFIG electrical subsystem, and grid-interface controller. The implementation utilizes MATLAB's Simulink environment with specialized Power Systems toolbox components for accurate electrical system modeling.

The performance evaluation covers different wind speed scenarios, analyzing power output stability, grid synchronization capability, and dynamic response characteristics. The model structure incorporates pitch angle control algorithms and rotor-side converter control strategies to maintain optimal power extraction. We discuss the model's advantages in simulating real-world wind variability and its limitations in handling extreme gust conditions.

Additionally, we provide improvement suggestions focusing on enhanced maximum power point tracking (MPPT) algorithms and advanced fault ride-through capabilities. Potential code modifications include implementing adaptive control techniques in the MATLAB Function blocks and optimizing the DC-link voltage regulation logic for better stability under turbulent wind conditions.