Abstract
In this paper, a topology for a doubly-fed induction generator (DFIG) using a direct Two-stage Matrix Converter (TSMC), connected between the stator and the rotor, is presented. The input stage is connected to the grid and provides the required dc voltage for the output stages. Space vector modulation is used for the input stage producing the maximum dc voltage, with unity power factor operation at the TSMC grid-side input. Each of the output stage is connected to the rotor of a DFIG. The control of the generator rotor currents is carried out using standard vector control approach with a reference frame aligned with stator flux. The entire system is modeled and the results are presented to show the feasibility of the proposed scheme.
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