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The increasing number of distributed power generation systems (DPGSs) is changing the traditional organization of the electrical network. An important part of these DPGSs is based on renewable energy sources. In order to guarantee an efficient integration of renewable-based generation units, grid codes must be fulfilled. Their most demanding requirements, such as low-voltage ride-through and grid...
Proportional-integral (PI) controllers in a positive-sequence (PS) synchronous reference frame (SRF) are widely employed for ac machines. Resonant controllers (RCs) in stationary frame are equivalent to PI ones in a positive- and a negative-sequence SRF simultaneously. However, as shown in this work, the additional open-loop pole at the negative-sequence in RCs alters the trajectories of the closed-loop...
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