A Transformer-Less Ultra-Gain Switched Inductor Boost Converter for DC Microgrid Applications

Abstract

In a DC microgrid, the integration of renewable energy sources requires a DC-to-DC converter for a better communication and energy transfer. The conventional boost converter endures many snags owing to its operation at an extremely large duty ratio to obtain a substantial suitable high voltage at its output terminals. This paper introduces a novel converter which is capable of attaining a significantly high gain at a nominal duty ratio. The converter structure is free from transformer, coupled inductors, or any cascading complex networks. The proposed topology uses switched inductors along with a capacitor and diode to act as a boosting element. Apart from a detailed topological description, the converter is analyzed in steady-state modes of CCM and DCM. The analytical findings of gain factor other relevant parameters have been well verified by the simulation results at the end.