Breakthrough in Sustainable Energy: Development of Switched-Capacitor Multilevel Inverters

Strategic Insights -

Researchers from the Department of Electrical Engineering at Jc Bose Univ Sci Technol have made a significant contribution to the field of sustainable energy with the development of switched-capacitor multilevel inverters (SCMLIs) for photovoltaic (PV) systems. The innovative design enables self-balancing and voltage boosting, generating a step-up AC output voltage, and reducing the number of components required. The proposed topology, known as 7L-PV-RSCMLI, achieves a 7-level output voltage with a peak value three times the input DC-bus voltage, making it a more efficient and compact solution. The researchers have also developed a modified Regula Falsi method (MRFM) algorithm to track the maximum power point, enhancing the performance of the PV system.

Key Takeaways:

  • The development of SCMLIs enables the generation of a step-up AC output voltage, improving power quality and increasing the power capacity of PV systems.
  • The 7L-PV-RSCMLI topology reduces the number of components required, making it a more efficient and compact solution.
  • The proposed design achieves a 7-level output voltage with a peak value three times the input DC-bus voltage.
  • The MRFM algorithm is used to track the maximum power point, enhancing the performance of the PV system.
  • The inverter generates 7L stepped output voltage waveform, improving power quality.
  • The proposed design has been validated through simulations in the MATLAB Simulink environment and experimental results from a laboratory prototype.
  • The total harmonic distortion of the 7L inverter output voltage observed in the simulation and experimental results are 11.41% and 11.64%, respectively.

Statistics:

  • 7-level output voltage achieved by the proposed topology.
  • 3 times increase in DC-bus voltage.
  • 11.41% total harmonic distortion (THD) observed in simulation results.
  • 11.64% THD observed in experimental results.
  • 8 switches used in the proposed design.
  • 7-level stepped output voltage waveform generated by the inverter.
  • MATLAB Simulink environment used for simulations.
  • Laboratory prototype used for experimental validation.

Sources:

  • "Development and Performance Assessment of Switched-capacitor Multilevel Inverters for Solar Pv Applications". Sustainable Energy Technologies and Assessments, 2025;79.
  • Elsevier. Radarweg 29, 1043 Nx Amsterdam, Netherlands.
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  • VerticalNews. Research findings on Energy - Sustainable Energy.