Abstract
This paper deals with the design and implementation of the control strategy of a grid connected Doubly Fed Induction Generator wind turbine on a TMS320F28335 Digital Signal Processor (DSP). The synthesized controller is a nonlinear Backstepping control law whose stability is guaranteed in the context of Lyapunov stability theory. The control aim is to optimize the power extracted by the generator for large wind speed variations through Maximum Power Point Tracking (MPPT) and Unity Power Factor (UPF) control. These command strategies are implemented in order to achieve the following specifications: good static precision for optimal energy conversion; electrical dynamics as high as possible regardless of slow mechanical dynamics, smooth transient without overshoots that could damage the lifecycle of the machine and converters, rapid disturbance isolation and robustness to any parametric variations or uncertainties. The results of the Hardware in the Loop (HIL) implementation on DSP show satisfactory performance in terms of response time, setpoint tracking, stability, and robustness under stochastic wind speed profile and parameter variations.
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