Abstract
A reduced switching components step-up multilevel inverter (RSCS-MLI) is presented in the paper. The basic circuit of the proposed MLI can produce 11 levels in the output voltage with a reduced number of switching components. The other features of the proposed circuit include a low value of voltage stresses and the inherent generation of the voltage levels pertaining to the negative half without the requirement of an H-bridge. Fundamental frequency switching technique, also known as Nearest Level Control (NLC) technique, is implemented in the proposed topology for generating the switching signals. The experimental total harmonic distortion (THD) in the output voltage comes out to be 9.4% for modulation index equal to 1. Based on different parameters, a comparative study has been shown in the paper, which makes the claim of the proposed MLI stronger. An experimental setup is prepared to carry out the hardware implementation of the proposed structure and monitor its performance under dynamic load conditions, which is also used to verify the simulation results. Power loss analysis, carried out by using PLECS software, helps us to gain insight into different losses occurring while operating the inverter. The different results are explained and analyzed in the paper.
Highlights
Multilevel inverters are the main components in low to high voltage industrial applications such as electric vehicles, HVDC, FACTS devices, renewable power generation plants, micro grids etc
H-bridge (CHB), neutral point clamped (NPC), and flying capacitor (FC) MLIs [4,5,6]. These topologies have drawbacks such as a high number of dc sources, switches, and other components. They suffer from high voltage stress, high harmonic distortions etc
The topology was tested under dynamic loading conditions
Summary
Multilevel inverters are the main components in low to high voltage industrial applications such as electric vehicles, HVDC, FACTS devices, renewable power generation plants, micro grids etc. H-bridge (CHB), neutral point clamped (NPC), and flying capacitor (FC) MLIs [4,5,6] These topologies have drawbacks such as a high number of dc sources, switches, and other components. With the increase in level, the number of the dc source increase Another 11-level multilevel inverter topology is proposed with fewer components and three dc voltage sources [9]. The presented topology produces 13 levels with nine switches and three dc voltage sources Another multilevel inverter with a boosting feature comprising a switched capacitor with 7 achievable voltage levels has been introduced [17]. A novel configuration of MLI is presented in [20], which is called the K-type module It requires 14 semiconductor switches, two dc sources, and two capacitors to obtain the.
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