Family of Multiport Switched-Capacitor Multilevel Inverters for High Frequency AC Power Distribution


In order to distribute high-frequency ac power, this study offers a variety of SCMLI (switched-capacitor multilevel inverter) topologies with multiple ports. It makes use of asymmetric dc voltage sources with a common ground, making it perfect for use in solar farms and current electric vehicles. In comparison to numerous current topologies, the proposed family of step-up SCMLI achieves a higher number of output voltage steps with an optimal component count. The issue of balancing the voltage across the capacitors is no longer an issue because the capacitors are charged to a fixed voltage at each half-cycle. Staircase modulation techniques, namely, selective harmonic elimination and minimum total harmonic distortion (THD) schemes, are examined in depth, with a study of the fluctuation of switching angles and THD with modulation indices under both schemes. The suggested family of topologies has its working principles and analyses explained. The findings of the simulations are compared to the results of the experiments under both the equal and unequal output voltage waveform step modulation techniques.

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