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Wind speed estimation is an important issue when addressing the control or the monitoring of a wind turbine. A realistic value of wind speed could be very useful to improve performance of wind turbine controllers, either for scheduling or as an extra feed forward term. In addition, it could also be useful for fault diagnosis and fault-tolerant control of the wind turbine. The objective of this work...
This paper presents the real-time implementation of a bi input-extended Kalman filter (EKF) (BI-EKF)-based estimator in order to overcome the simultaneous estimation problem of the variations in stator resistance and rotor resistance aside from the load torque and all states required for the speed-sensorless control of induction motors (IMs) in the wide speed range. BI-EKF...
This paper presents a sensorless control strategy for a doubly fed induction machine, usually used as a generator for wind power. The proposed scheme consists of an Extended Kalman Filter fed by the voltages and currents of the stator and rotor in order to provide an estimation of the speed and position of the rotor. The simulation results prove the scheme's feasibility over a wide range of speed...
This paper presents a comparative study of two sensorless Permanent Magnet Synchronous Motor drive control algorithms using an optimal two stage extended Kalman filter. Beside the estimation of position and rotor velocity with and without the estimation of load torque is considered. An algorithm proposed by C.S. Hsieh and F.C. Chen in 1999 for linear parameter estimation is extended to the non-linear...
In an increasing number of applications highly dynamic electrical drives, characterized by high quality torque control, are demanded. Direct torque control (DTC) for AC machines, permanent magnet synchronous motors (PMSM) or induction machines, can provide this accurate and fast torque control. When applying DTC the change of the stator flux linkage vector is controlled, based on torque and flux errors...
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