General Model of Permanent Magnet Synchronous Generator Wind Power Generation

The Permanent Magnet Synchronous Generator (PMSG) wind power generation general model is a widely used simulation model in renewable energy generation systems, primarily employed to study the dynamic characteristics and control strategies of wind power generation systems. This model is implemented in the MATLAB simulation environment and can simulate the operational states of actual wind power generation systems.

The model mainly consists of the following key components:

Wind turbine model: Simulates the conversion process from wind energy to mechanical energy, calculating output mechanical torque through aerodynamic characteristic equations. Implementation typically involves using lookup tables or polynomial equations to represent the relationship between wind speed and power coefficient. The blade pitch angle control algorithm is crucial for optimizing power capture under varying wind conditions.

Mechanical transmission system: Typically employs a single-mass or two-mass model, considering shaft stiffness and mechanical losses. The two-mass model implementation requires solving differential equations for both turbine and generator inertias connected by a flexible shaft, providing more accurate torsional vibration analysis.

Permanent magnet synchronous generator: Establishes a mathematical model in the d-q reference frame, containing fundamental equation sets including stator voltage equations, flux linkage equations, and motion equations. The Park transformation is implemented to convert three-phase quantities to the rotating d-q frame, simplifying control design.

Power electronic converters: Include machine-side converters and grid-side converters, implementing power control and grid-connection functions. The PWM (Pulse Width Modulation) control algorithm and space vector modulation techniques are typically implemented for efficient power conversion.

Control system: Comprises multi-level control strategies including Maximum Power Point Tracking (MPPT) control, vector control, and grid-connection control. The MPPT algorithm implementation often uses hill-climbing or optimal torque control methods, while vector control employs PI regulators for current and speed control loops.

Simulation analysis using this general model helps researchers evaluate system response characteristics under different wind speed conditions, optimize control parameters, and improve generation efficiency and grid compatibility. By adjusting model parameters, the model can be adapted to different types and capacities of permanent magnet synchronous wind power generation systems.