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An ALQR (Adaptive Linear Quadratic Regulation) method for the variable speed wind turbines system is proposed in this paper. The controller is designed for the wind turbine operating in the low wind speed (Region 2), in which the pitch of the blades is fixed at the optimal angle. Since the wind turbine is a nonlinear system, the Kalman filter and the adaptive method are implemented in the controller...
A linear electrical generator is a kind of device which can be used to wave energy converter, for directly converting mechanical energy of a floating structure into electrical energy. A wave farm consists of multiple wave energy converters in a sea area. In the present paper, a numerical model is proposed considering the interference effect in the multiple floating structures, and the controlling...
Classical QFD can not analyze the uncertainty involved thoroughly. To deal with the problem, a new method based on cloud model was presented. The numerical character and certainty degree of the cloud drops were analyzed through the forward cloud generator, backward cloud generator and cloud expected curve. The importance of the customer demand and the engineering measures were described from both...
Taking Matlab/Simulink as a platform, a single-machine infinite-bus system simulation model of AC excited generator (ACEG) is established. The stator flux oriented vector control strategy and direct power control strategy of ACEG are proposed in this paper. With this model of ACEG, the steady state regulation characteristics of active power and reactive power and the transient processes of a sudden...
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