Solar photovoltaic (PV) is one of the most favourable renewable energy types today, the use of which has grown throughout the world, and much more is expected in the future due to the continuous price drop. It is important to further develop renewable systems to generate green energy, which results in the reduction of air pollution and in enabling a future sustainable society for the next generation of people. Accordingly, new topologies of the multilevel converter have been proposed and investigated for PV applications to achieve high efficiency and high-power density. This study presents the analysis and design of the symmetrical three-phase E-type inverter (S-3Φ7L E-type). The proposed topology is directly derived from the T-type converter and exhibits seven voltage levels at the output offering interesting performance in terms of power semiconductors current and voltage stress. The hardware design process of the converter has been carried out to enhance the efficiency conversion. Finally, theoretical results are carefully verified by testing the converter prototype, featuring a peak efficiency of 99%.
Di Benedetto, M., Lidozzi, A., Solero, L., Crescimbini, F., Grbovic, P.J. (2020). Symmetrical three-phase seven-level E-type inverter for PV systems: Design and operation. IET RENEWABLE POWER GENERATION, 14(15), 2852-2863 [10.1049/iet-rpg.2019.1499].
Symmetrical three-phase seven-level E-type inverter for PV systems: Design and operation
Di Benedetto M.;Lidozzi A.;Solero L.;Crescimbini F.;
2020-01-01
Abstract
Solar photovoltaic (PV) is one of the most favourable renewable energy types today, the use of which has grown throughout the world, and much more is expected in the future due to the continuous price drop. It is important to further develop renewable systems to generate green energy, which results in the reduction of air pollution and in enabling a future sustainable society for the next generation of people. Accordingly, new topologies of the multilevel converter have been proposed and investigated for PV applications to achieve high efficiency and high-power density. This study presents the analysis and design of the symmetrical three-phase E-type inverter (S-3Φ7L E-type). The proposed topology is directly derived from the T-type converter and exhibits seven voltage levels at the output offering interesting performance in terms of power semiconductors current and voltage stress. The hardware design process of the converter has been carried out to enhance the efficiency conversion. Finally, theoretical results are carefully verified by testing the converter prototype, featuring a peak efficiency of 99%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
