Abstract
Because of the lack of galvanic isolation, the leakage current causes problems in transformerless three-phase photovoltaic (PV) systems. The conventional three-phase photovoltaic inverter failed to limit the leakage current in a constructive way. In order to solve the leakage current problems in the conventional three-phase photovoltaic inverter, a three-phase transformerless H10 inverter is proposed by combining the conventional four-leg inverter of two switched-boost networks in this paper. The proposed three-phase transformerless H10 inverter has the major features as shoot-through immunity, boost voltage with one-stage conversion. Furthermore, a common-mode voltage of the proposed three-phase transformerless H10 inverter is kept constant during switching cycles. The operating principles for the proposed three-phase transformerless H10 inverter are presented. Finally, the proposed three-phase transformerless H10 inverter topology is tested, and the results validate the effectiveness of the proposed three-phase transformerless H10 inverter topology.
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This research was supported by Research Foundation funded by Thai Nguyen University of Technology.
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Ngo, MD., Nong, QV., Ngo, TN., Tran, TT. (2022). A Three-Phase Transformerless H10 Inverter with Constant Common-Mode Voltage for Photovoltaic Application. In: Nguyen, D.C., Vu, N.P., Long, B.T., Puta, H., Sattler, KU. (eds) Advances in Engineering Research and Application. ICERA 2021. Lecture Notes in Networks and Systems, vol 366. Springer, Cham. https://doi.org/10.1007/978-3-030-92574-1_14
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DOI: https://doi.org/10.1007/978-3-030-92574-1_14
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