Multilevel Boost Inverter with Switched Capacitor for Smart Grid Applications

Abstract

Power electronic Inverters that are required to connect Direct Current power sources to the Alternating Current grid. Conventional inverters frequently employ massive, costly, and lossy transformers and harmonic filters. Currently, reduced number of circuit components and voltage sources are considered as one of the most important features in Multi-Level Inverters (MLIs). These are a potential adjunct to traditional inverters, providing lower THD, an inductor-free design, and a wider range of operation. These generate a stepped waveform that closely resembles a sine waveform. Smart grids may include multiple sources, and whenever these sources have low THD, the demand for monitoring data at the site of common coupling is minimized. Two switching multilevel inverters of capacitor-based with boost capabilities and reduced THD are suggested in this study. The inverters contain built-in charge balancing, eliminating the need for voltage sensors and additional circuits. Phase Disposition PWM(PDPWM) technology is used to modulate the switches in the inverters, allowing for better voltage regulation and lower switching losses. Simulation is used to validate the designs, the parameters and output waveforms are shown.