LQ multimodel optimal controller for wind turbine with Kalman filter wind speed estimation

Abstract

In the present paper, a LQ multimodel optimal control approach for variable speed with pitch regulated (operating at high wind speeds) is proposed to allow the wind turbine to participate in frequency regulation and this by creating a reserve in power. This new control structure consisted of an optimal quadratic regulator combined with integral action and a reference model on the outputs, on one hand and with a wind estimator on the other hand, in order to allow a fast tracking of the power reference. These results show best performance for the control strategy developed with the wind estimator based on the Kalman filter.