Abstract: In this article, a novel seven-level inverter that performs on a single DC source and is suitable for solar and wind applications is described. By integrating floating capacitors (FC) using a switched-capacitor method, the desired outcome is produced. Due to its sensorless capacitor voltage balancing capability, which minimizes control concerns when generating a tripolar staircase pattern, this arrangement has gained recognition. Sustainable performance that prevents accidental capacitor overvoltage is another benefit. To regulate the topology's operation, a phase disposition pulse-width modulation (PD-PWM) technique has been used. Additionally, fewer semiconductor devices are used in the suggested topology. To demonstrate the positive aspects of the suggested structure regarding reducing the number of switches, a thorough comparison of various recently developed 7L inverter designs is given. Under various parametric constraints, the effective implementation of the suggested structure is examined using MATLAB/Simulink. The feasibility of the study and the functionality of the proposed topology are subsequently verified using hardware-in-loop (HIL) experiments.

Keywords: Multi-level inverter, self-voltage balancing, single-source, switched capacitor, Total Harmonic Distortion, Total Standing Voltage, OPAL-RT

Pages: 278-288