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

Abstract

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.