An optimal control strategy for DFIG

For doubly fed induction machines operating as wind generators (DFIG), the terminal voltage and the active power delivered to the grid are controlled by a PWM converter linked to the machine rotor. The monitoring of the direct and quadrature axis components of the rotor voltage makes possible the co...

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Bibliographic Details
Published in2010 IEEE International Conference on Industrial Technology pp. 1727 - 1732
Main Authors Barros, Luciano Sales, Mota, Wellington Santos, da Silva, Jaidílson Jó, Barros, Camila
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2010
Subjects
Induction generators
Induction machines
Mesh generation
Optimal control
Power generation
Pulse width modulation converters
Rotors
Voltage control
Wind energy generation
Wind power generation
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Summary:For doubly fed induction machines operating as wind generators (DFIG), the terminal voltage and the active power delivered to the grid are controlled by a PWM converter linked to the machine rotor. The monitoring of the direct and quadrature axis components of the rotor voltage makes possible the control of the terminal voltage and active power, respectively. Currently, this control is performed by proportional-integral (PI) blocks where the gains and time constants are tuned by trial and error method until wanted response be obtained. This work proposes a control strategy based on the system states optimal feedback. This new strategy includes the rotor current control and provides a methodology to computation of the controller parameters. Besides, for the DFIG representation, the electromechanical coupling between turbine shaft and machine rotor is taken into account. Power systems simulations were carried out to evaluate the performance of the proposed control strategy.
ISBN:1424456959
9781424456956
DOI:10.1109/ICIT.2010.5472460