Examinando por Autor "Oraee, Hashem"

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    Improvement of Post-Fault Performance of a Cascaded H-bridge Multilevel Inverter
    (Institute of Electrical and Electronics Engineers Inc., 2017-04) Ouni, Saeed; Zolghadri, Mohammad Reza; Khodabandeh, Masih; Shahbazi, Mahmoud; Rodríguez, Jose; Oraee, Hashem; Lezana, Pablo; Schmeisser, Andres Ulloa
    This paper is focused on improving the post-fault performance of cascaded H-bridge multilevel inverters by decreasing the common-mode voltage. First, an algorithm is proposed to determine the optimal post-fault state among all possible states, which have the same maximum available voltage. Furthermore, a modified technique is proposed to calculate the references of inverter phase voltages under faulty conditions. This technique leads to a decrease in the common-mode voltage when the required output voltage is less than its maximum value. These solutions are mutually employed in the post-fault control system. Simulation and experimental results confirm the effectiveness of the proposed solutions in comparison with the existing methods in different cases. © 2017 IEEE.