Pitch Angle Control of Modern Variable Speed Variable Pitch Wind Turbine Based on Linear Active Disturbance Rejection Control Approach

Abstract

In this paper, the problem of maximizing energy yield from the available wind is addressed by using a robust Proportional-Derivative (PD) controller in combination with a Linear Active Disturbance Rejection Control (LADRC) approach. Firstly, the theory of the Wind Turbine (WT) pitch control algorithms is analysed and then based on the analysis, 1.5 MW WT model with a Servo System (SS) and Doubly Fed Induction Generator (DFIG) is developed. The blade pitch angle (R) is controlled to ensure that the variable speed WT system operate safely and the optimum power is achieved. Developed LADRC algorithm reveal dynamic performance of the blade pitch angle, rotor speed and rated power characteristics. Within the wind turbine standard operating regimes, controllers have shown promising results. Proposed LADRC technique validates superior performance. Finally, MATLAB/SIMULINK tool box establishes the corresponding model to simulation test in order to verify the effectiveness and correctness of the analysed algorithms. Simulation result demonstrates that the developed pitch servo control system has good dynamic, steady state performance and robustness.