Backstepping Control Strategy Research Of Doubly-fed Wind Power Generation System

Doubly fed induction generator DFIG wind power generation system used has the advantages of simple structure,high power generation efficiency,easy installation,in addition,the system also has some defects,it has nonlinear and strong coupling characteristics increase the difficulty of the design of the controller,to reduce the possibility of high performance operation.In this case,can improve the system performance of simple control algorithm came into being.This paper firstly introduces the mathematical model in the three-phase static coordinate system of doubly fed induction motor,the mathematical model and then established the system in the two-phase synchronous rotating through coordinate transformation,and design a vector controller based on stator flux orientation,the simulation for the analysis of foundation.In this paper,the backstepping control is introduced for the doubly fed induction motor.Design of backstepping control is usually from the control system to the controller,at the same time combined with the Lyapunov stability theory,the controller can guarantee the stability of the system,and the system can achieve the global regulation or tracking,achieve the expected performance index.This paper mainly studies the direct power of the backstepping control strategy of vector control and backstepping control strategy based on the power tracking design as the control target to backstepping controller,which is designed for current tracking control target to backstepping controller.In this paper,the simulation model of double fed wind power generation system is built on the Matlab/Simulink platform.The simulation is completed,will be doubly fed wind power generation system simulation waveform control and vector control of doubly fed wind power generation system simulation waveform control by backstepping controller is compared,can be found in decoupling,two control modes can realize the power tracking control,backstepping control strategy simulation waveform but faster response speed,and when the parameters of after the change,the backstepping control strategy of response waveform is more stable and has better robustness to the parameter change.