Scientific Reports (Mar 2021)

Experimental validation of new self-voltage balanced 9L-ANPC inverter for photovoltaic applications

  • M. Jagabar Sathik,
  • Dhafer J. Almakhles,
  • N. Sandeep,
  • Marif Daula Siddique

DOI
https://doi.org/10.1038/s41598-021-84531-z
Journal volume & issue
Vol. 11, no. 1
pp. 1 – 14

Abstract

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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.