A Transformer Less Self-Balancing High-Gain 7-Level Inverter With Minimum Component Count and Lower Voltage Stresses for Solar Pv Applications

This article presents a revolutionary 7-level, nine-times voltage boosting property converter. The main disadvantage of traditional Multilevel Inverter (MLI) is that, in order to use renewable energy sources, a high-voltage DC-DC chopper must be tolerant of raise input voltage. The suggested converter makes use of ten switches, two inductors, four diodes, three switching capacitors, and just one DC supply. The capacitor’s voltage equalizes itself automatically. Less components are needed and a capacitor is used instead of a DC source to create the switched capacitor MLI. To produce the output voltage waveforms with seven levels, the switching Inductor/capacitor must be appropriately charged and discharged. Without requiring a voltage regulating circuit with a closed loop, the suggested inverter can self-balance the capacitor’s voltage. Because of the continuous series-parallel discharge and charging over a full cycle, three capacitors receive equal charges from the input source and the inductors. Compared to the majority of recently produced topologies, the suggested 7-level Switched Capacitor (SC) inverter involves a reduced number of switches, driver diodes, capacitors, also semiconductor switches. Additionally, four pairs of switches run simultaneously using the same control signal, simplifying the control system, and eight of the ten the fundamental frequency is used by switches to function. An elementary frequency switching system is employed to regulate the inverter’s output. On the PSIM/MATLAB platform, the suggested structure’s voltage-boosting and self-balancing capabilities are verified.