Sequence Component Extraction Based on Recursive Least Squares for Wind Energy Applications

In this paper, a sequence component extractor based on a recursive least square is used in a wind generation application. The deadbeat controller computes the rotor voltage to be applied to the doubly fed induction generator during the voltage sag condition. The control is designed by the discretized rotor equations and makes use of the stator field-oriented control technique. The SCE–RLS calculates each sequence component of stator voltages or currents that allow the right position of the mentioned vectors. Comparisons made by MATLAB/Simulink and by experimental tests corroborate the advantageous of the proposed recursive least squares extractor over the one based on the Secondary General Order Integrator.