@article{da32fb4ba9b649babaa04284e3dee039,
title = "A cascaded DC-AC-AC grid-tied converter for PV plants with AC-link",
abstract = "Cascaded multilevel converters based on medium-frequency (MF) AC-links have been proposed as alternatives to the traditional low-voltage inverter, which uses a bulky low-frequency transformer step-up voltage to medium voltage (MV) levels. In this paper, a three-phase cascaded DC-AC-AC converter with AC-link for medium-voltage applications is proposed. Three stages integrate each DC-AC-AC converter (cell): a MF square voltage generator; a MF transformer with four windings; and an AC-AC converter. Then, k DC-AC-AC converters are cascaded to generate the multilevel topology. This converter{\textquoteright}s topological structure avoids the per-phase imbalance; this simplifies the control and reduces the problem only to solve the per-cell unbalance. Two sets of simulations were performed to verify the converter{\textquoteright}s operation (off-grid and grid-connected modes). Finally, the papers present two reduced preliminary laboratory prototypes, one validating the cascaded configuration and the other validating the three-phase configuration.",
keywords = "AC-AC converter, AC-link, Cascaded converter, Matrix converter, Medium-frequency magnetic link, Multilevel converter, Photovoltaic",
author = "Barrios, {Manuel A.} and V{\'i}ctor C{\'a}rdenas and Sandoval, {Jose M.} and Guerrero, {Josep M.} and Vasquez, {Juan C.}",
note = "Funding Information: This research work was supported by the project UASLP-TRAFOS UASLP/AG-038/18. The authors would like to thank The National Council of Science and Technology of Mexico (CONACyT) for the academic scholarship under the grant number 486788. Funding Information: Acknowledgments: This work was supported by VILLUM FONDEN under VILLUM Investigator Grant 25920 from the Center for Research on Microgrids (CROM); www.crom.et.aau.dk. The authors acknowledge to the UASLP Electrical Power Quality and Motor Control Laboratory (LABCEECM) staff for technical and material support during the experimental stage. Funding Information: Funding: This research work was supported by the project UASLP-TRAFOS UASLP/AG-038/18. The authors would like to thank The National Council of Science and Technology of Mexico (CONA-CyT) for the academic scholarship under the grant number 486788. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",
year = "2021",
month = feb,
day = "2",
doi = "10.3390/electronics10040409",
language = "English",
volume = "10",
pages = "1--21",
journal = "Electronics (Switzerland)",
issn = "2079-9292",
publisher = "MDPI AG",
number = "4",
}