摘要：This paper presents and analyzes the use of a Brushless Doubly Fed Induction Generator (BDFIG) in an autonomous wind conversion system for a water pumping application. Because of no brushes and slip rings, the BDFIG is suitable for autonomous systems, which often work in hard conditions. The BDFIG mathematical model is reviewed and an analysis of the electrical torques and the power flow on both stators is presented. The system operation strategy proposes to maximize the volume of water pumped based on the optimization of the wind energy capture. To do that, a Sliding Mode Control (SMC) tracks the optimal turbine torque by means of a torque control. The SMC varies the auxiliary stator frequency of the BDFIG in order to change the feeding frequency of the pumping unit. With that, the wind turbine and water pump shaft speeds can be decoupled, improving the system efficiency. In addition, an analysis of the whole system operation points and
关键词：Brushless Doubly Fed Induction Generator; Wind Energy; Water Pumping;Dynamical Sliding Mode Control
