New High Gain 2LC-Y Multilevel-Boost-Converter (2LC-Y MBC) Topologies for Renewable Energy Conversion: Members of X-Y Converter Family

Abstract

This paper presents a new high gain 2LC-Y Multilevel-Boost-Converter or 2LC-Y MBC topologies for renewable energy conversion. Four new topologies 2LC-L MBC, 2LC-2L MBC, 2LC-2LC MBC, and 2LC-2LCm MBC are developed by combination of the voltage multiplier characteristics and the traditional 2LC-Y topologies of XY family (2LC-L, 2LC-2L, 2LC-2LC, and 2LC-2LCm) to achieve high voltage gain. These topologies are beneficial when used in applications where low to high voltage conversion is required, which makes it suitable for renewable energy applications like photovoltaic systems, fuel-cell system, hybrid vehicle, HVDC, and DC drives etc. Additionally, a stack of multiple capacitors present at the output side makes the proposed topologies highly suitable for utility grid using multilevel inverter (MLI). The operating principle of proposed 2LC-2LCm MBC topology is explained in detail and voltage gain analysis of the proposed converters is presented. Moreover, all the proposed topologies are compared with each others in terms of voltage gain. The simulation results validated the operation of the proposed converter and perfectly matching with the theoretical analysis. - 2019 IEEE.