Design and Development of 15-Level Asymmetrical Cascaded Multilevel Inverter

Abstract

In this paper, a photovoltaic model is designed and developed for generating 110 V (RMS) is presented. The voltage obtained out of the photovoltaic (PV) module is comparatively less and variable in nature. The model presented in this paper consists of three voltage fed-back boost converters that are designed and modeled using state-space averaging technique (SSA) in order to obtain a higher and stabilized constant DC output voltage. This boosted output is fed to an asymmetrical 15-level multilevel inverter to convert DC to AC. The switching angles for the 15-level H-bridge multilevel inverter are designed using equal area criteria. The designed circuit is developed using IRFP250N and IRF840 MOSFETs. The simulation and hardware results compared in the result section convey that the proposed design is able to produce 110 V (RMS) for variable loads.