Nonlinear adaptive backstepping control for variable-speed wind energy conversion system-based permanent magnet synchronous generator

In this paper, a robust nonlinear adaptive controller based on backstepping control strategy is adopted for a variable-speed wind energy conversion system with permanent magnet synchronous generator (PMSG). Firstly, field-oriented control law based on PI controllers has been introduced. Nevertheless, it presents a noticeable tracking error; thus, the system control is improved by using a backstepping controller. This method provides a simple and fast tracking. However, it is sensitive to parameter uncertainties and load torque disturbances. Therefore, an adaptive backstepping control system is then designed to compensate the parameter uncertainties of the system. Simulation results validate the effectiveness of the proposed control law.