High Performance Frequency Converter Controlled Variable-Speed Wind Generator Using Linear-Quadratic Regulator Controller

This article proposes an optimal control strategy with a view to achieving the best performance of a wind energy conversion system (WECS). The optimal control strategy depends on the linear-quadratic regulator (LQR) algorithm, which provides fast convergence and less mathematical intricacy. The machine- and the grid-side converter/inverter are adjusted using the LQR controller. In this article, the system model and its control strategies are illustrated. Practical wind speed data are considered in this article for achieving realistic responses. The system performance is evaluated by comparing the results obtained using the LQR controller with that realized when the grey wolf optimizer algorithm-based optimized proportional-integral controllers are used, taken into account severe network disturbances. The simulation studies are extensively performed through the MATLAB/Simulink environment that prove the validity of the LQR controller for improving the performance of the WECS. The simulation results are compared with the experimental results for more validation.