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A simplified transient model of the Doubly Fed Induction Generator (DFIG) is used to investigate the effects when the voltage sags impose to the DFIG generation system. It is identified that the symmetrical transient voltage sag creates a DC component in the magnetic field which causes over currents in both the stator and rotor windings. The characteristics of the DC flux component are investigated...
It is proposed in this paper a methodology to obtain optimal controllers gains for the rotor-side converter of doubly fed induction generators (DFIGs) using a genetic algorithm approach. The main objective is to enhance the operational security and robustness of the power system, by a more effective contribution of the DFIG controllers to the system controllability. To reach this goal, the crow-bar...
The Brushless Doubly-Fed Induction Generator (BDFIG) shows commercial promise as replacement for doubly-fed slip-ring generators for wind power applications by offering reduced capital and operational costs due to its brushless operation. In order to facilitate its commercial deployment, the capabilities of the BDFIG system to comply with grid code requirements have to be assessed. This paper, for...
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