Non-isolated and inverting Nx multilevel boost converter for photovoltaic DC link applications

TLDR: In this article, an inverting Nx multilevel boost converter (Inverting Nx MBC) with continuous input current for DC link applications where several negative voltage levels are required with self-balancing such as photovoltaic (PV) multi-level inverter systems.

Abstract: This article presents an inverting Nx multilevel boost converter (Inverting Nx MBC) with continuous input current for DC link applications where several negative voltage levels are required with self-balancing such as photovoltaic (PV) multilevel inverter systems. The voltage obtains from the photovoltaic array need to boost before a feed to inverter for practical utilization or grid connect. In this paper new inverting Nx multilevel Boost converter (Inverting Nx MBC) with mode of operation and conversion ratio is discussed in detail. The proposed converter provides negative N time output voltage of the traditional boost converter. The main feature of this topology provides negative high-conversion ratio without using a transformer, continuous input current, moderate duty cycle operation and modularity. The proposed converter topologies are a combination of traditional boost converters and Cockcroft Walton (CW) multiplier. In this topology, each device block only one voltage level. Hence, low voltage devices may be used. The simulation results are provided which validates the functionality of proposed converter topology.