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This paper presents a comparative study of different speed estimators to implement a sensorless speed control loop in a wind generation system with a Three-phase boost rectifier operating in discontinuous conduction mode. For implementation of the speed estimators, the compared techniques start from the measurement of electrical quantities like currents and voltages, which are highly distorted because of the components at the switching frequency of the boost rectifier and also the low frequency harmonics at multiples of the generator fundamental frequency. It is shown the linear Kalman filter estimator is appropriate for this application because of its fast response time and low error obtained.

Comparative Study of Speed Estimators Applied to Wind Turbine with Harmonic Distortion in the Currents and the Voltages