Novel re-configurable topologies of SLC based high gain DC-DC converters

Abstract

Standalone renewable sources such as PV (Photovoltaic) and FC (Fuel cells) are often employed as input sources to supply high voltage DC buses of microgrids. Conventional DC-DC converter used as interlinking device would require a high duty ratio operation to meet the desired bus voltage which is usually perilous for the device health resulting in many detrimental effects such as diodes reverse recovery issues, unwanted transient response, losses and reduction in efficiency. To deal with such issues and for many other industrial applications, a two offspring family of Switched-inductor-capacitor (SLC) based converters have been discussed in this article. The proposed converter is realized without using any transformer, coupled-inductor, or cascaded and interleaved structures. Only two active switches with low voltage stress (half the output) are used to attain a sufficiently high voltage gain. Apart from the voltage gain, a critical inference is made after analyzing the reconfigured structure of an SLC network that a slight variation in the architecture delivers such a high gain compared to the counterpart design. The proposed converters have been analyzed theoretically in CCM and DCM, and then verified through the simulation results. 2022 IEEE.