DFIG Based on DQ-Axis Synchronous Rotating Reference Frame Mathematical Model

This Simulink model implements a doubly-fed induction generator (DFIG) based on the mathematical model using the DQ-axis synchronous rotating reference frame. DFIGs are commonly used in wind power and hydropower generation systems. The model employs the DQ-axis transformation technique which simplifies three-phase AC quantities into DC components in a synchronously rotating reference frame, enabling more efficient control algorithm implementation. Through Simulink simulation, this model allows comprehensive analysis of DFIG operational characteristics under various working conditions.

The mathematical foundation uses Park's transformation to convert three-phase stationary coordinates to two-axis rotating coordinates (D-Q frame), facilitating decoupled control of active and reactive power. Key implemented functions include stator flux orientation, rotor side converter control, and grid synchronization algorithms. This generator type offers high efficiency and stability, making it widely applicable in renewable energy applications.

Within this Simulink environment, users can adjust and optimize various parameters including PI controller gains, machine parameters, and control strategies to achieve optimal generation performance. The simulation enables detailed study of DFIG dynamic response during grid disturbances, voltage dips, and power reference changes. The model incorporates voltage-oriented vector control with feedforward compensation and current regulation loops for precise power control.

This DFIG Simulink model based on the DQ-axis synchronous rotating reference frame serves as an essential tool for understanding and optimizing doubly-fed generator operations, particularly for renewable energy system integration studies and control strategy development.