A New Five-Level Transformerless Boost Inverter for Renewable Energy Applications

Abstract

This paper introduces a new five-level boost inverter based on a single capacitor to be fit for transformerless renewable energy systems. The proposed single-phase topology consists of a single dc source, six switches, a single diode, and a single capacitor. Compared to the latest publishing of five levels of boost inverters, it has fewer components and a simple structure. The inverter's operation is based on charge-pump theory, which utilizes parallel charging and series discharging of the capacitor to increase the output voltage. Due to the suggested configuration's need for a specific control technique, a level-shift pulse width modulation approach is designed to drive the switches and create the necessary pulse pattern by comparing the reference signal with four carriers. The designed inverter is unique in several respects, including using a single dc-source and a single capacitor, small size, specific control needs, and boosting capacity. To test the efficacy of the proposed five-stage setup, a simulation MATLAB/Simulink is used. The constructed five-level multilevel inverter performs as intended, as the findings show.