sinusoidal output current implementation in dfig using repetitive controller under generalized harmonic power grid with frequency deviation - 2015
The paper presents the management strategy of stator current harmonic distortion performance improvement for doubly fed induction generator (DFIG) using bandwidth-based repetitive control (BRC) below generalized harmonic grid voltage. The control target is to eliminate the DFIG stator current $6n pm 1$ harmonic elements; so, sinusoidal stator output current can be injected into the power grid. Considering that the frequency deviation invariably happens in the practical grid, the BRC regulator is intended on the basis of typical repetitive management regulator with the introduction of control bandwidth. The closed-loop operation stability considering completely different bandwidth and gain parameter is additionally analyzed. Finally, the supply of the proposed BRC control strategy beneath generalized harmonic grid voltage is verified by experimental results.
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