Affiliations 

  • 1 Renewable Energy Lab, College of Engineering, Prince Sultan University, Riyadh, Saudi Arabia. mjsathik@ieee.org
  • 2 Renewable Energy Lab, College of Engineering, Prince Sultan University, Riyadh, Saudi Arabia. dalmakhles@psu.edu.sa
  • 3 Malviya National Institute of Science and Technology, Jaipur, India
  • 4 Univerity of Malaya, Kuala Lumpur, Malaysia
Sci Rep, 2021 Mar 03;11(1):5067.
PMID: 33658562 DOI: 10.1038/s41598-021-84531-z

Abstract

Multilevel inverters play an important role in extracting the power from renewable energy resources and delivering the output voltage with high quality to the load. This paper proposes a new single-stage switched capacitor nine-level inverter, which comprises an improved T-type inverter, auxiliary switch, and switched cell unit. The proposed topology effectively reduces the DC-link capacitor voltage and exhibits superior performance over recently switched-capacitor inverter topologies in terms of the number of power components and blocking voltage of the switches. A level-shifted multilevel pulse width modulation scheme with a modified triangular carrier wave is implemented to produce a high-quality stepped output voltage waveform with low switching frequency. The proposed nine-level inverter's effectiveness, driven by the recommended modulation technique, is experimentally verified under varying load conditions. The power loss and efficiency for the proposed nine-level inverter are thoroughly discussed with different loads.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.