A New Transformerless Single-Phase Eleven-Level Inverter with Reduction of Switches Based on Model Predictive Control Method

摘要

This paper proposes a new single-phase 11-level transformerless symmetric/asymmetric inverter with a reduced number of switches. The proposed structure is capable of generating high voltage levels with a lower number of power components (including power switches and gate drivers) for both symmetrical and asymmetrical structures. The symmetric results of the proposed topology are compared with the other symmetric 11-level structures in terms of total harmonic distortion, overall efficiency, total number of switches, number of gate drives and required dc sources. The results show that the system's overall efficiency is high; hence, the system's life span will be high. To regulate the injected current, the model predictive control is applied to control the switches in order to be able to follow the reference current. The performance of the proposed structure is verified by the simulation (PSCAD) results.