PROJECT TITLE :

Quasi Cascaded H-Bridge Five-Level Boost Inverter - 2017

ABSTRACT:

Latterly, multilevel inverters became more engaging for researchers because of low total harmonic distortion in the output voltage and low electromagnetic interference. This paper proposes a novel single-stage quasi-cascaded H-bridge 5-level boost inverter (qCHB-FLBI). The proposed five-level inverter has the advantages over the CHB quasi-Z-supply inverter in cutting down passive elements. Consequently, size, value, and weight of the proposed inverter are reduced. Additionally, the proposed qCHB-FLBI will work within the shoot-though state. A capacitor with low voltage rating is added to the proposed topology to get rid of an offset voltage of the output ac voltage when the input voltages of two modules are unbalanced. Besides, a easy PID controller is employed to control the capacitor voltage of each module. This paper presents circuit analysis, the operating principles, and simulation results of the proposed qCHB-FLBI. A 1.two-kVA laboratory prototype was constructed primarily based on a DSP TMS320F28335 to validate the operating principle of the proposed inverter.