Design and Analysis of a Novel Bi-Directional High Gain DC-DC Converter for Renewable Applications

Bidirectional DC-DC converters (BDCs) are of significant importance in applications involving batteries and this article presents a BDC arrangement with two inductors, four capacitors, and six switches. A comprehensive analysis of the proposed converter is presented, including the derivation of the voltage transfer ratio (VTR) during both Step-Up and Step-Down modes. Additionally, the lowered voltage stress on MOSFETs leads to reduced switching losses. The derived transfer ratios are validated through circuit-level simulations. The converter is specifically designed for a 300 W, 350 V high-voltage side and a 48 V low-voltage side, operating at a frequency of 50 kHz. Simulation results demonstrate the converter's performance, with a notable improvement in VTR compared to other converters employing quadratic VTR.