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摘要
The nonlinear differential equations of the doubly fed induction generator (DFIG ) were derived to study the chaos phenomenon and chaos control in DFIG based on d-q axis model of DFIG. Under some operation status and parameters, the chaos motion of DFIG was proved by calculating the largest Lyapunov exponents spectrum of DFIG with Wolf algorithm. The decoupling controller was constructed to reduce the order of the chaos system by the flux-oriented vector control technique. The chaos controller was designed based on state feedback decoupling model with backstepping method. According to uncertain parameters or status of DFIG system, an adaptive backstepping method was proposed with decoupling model. The virtual control quantity was constructed to design control law to real time track and forecast the system parameters to chaos control. The stability of the chaos control system was analyzed to ensure the state of the system converging to set point quickly by structuring the Lyapunov equation. Aiming at different operation condition, the simulation results show that the DFIG system can escape quickly from chaos state to a stable operation by proposed decoupling adaptive backstepping method with fast response, strong robustness and high control accuracy.
- 出版日期2019
- 单位华南理工大学
