A Novel Bidirectional High Gain DC-DC Converter with Active Switched Inductor and Wide Voltage Conversion Ratio

Abstract

Energy storage devices are indispensable for ensuring voltage and frequency stability in renewable energy sources such as solar and wind. Distributed generation systems necessitate bidirectional DC-DC converters to facilitate charge and discharge operations in accordance with operational requirements. In this paper, we introduce a new bidirectional DC-DC converter tailored to achieve substantial voltage gain while minimizing switch stress and maintaining a minimal component count. The proposed converter operates in buck mode for one power flow direction and boost mode for the other, ensuring continuous input and output current and reduced charging/discharging ripple. Comprehensive details regarding the derivation, operational principles, and meticulous steady-state analysis of the proposed converter are presented in this paper. Furthermore, a dynamic model of the converter is provided, and the design of closed-loop controllers for current control modes is outlined. We present extensive analysis and simulation results to illustrate the efficacy and performance of this novel topology. In summary, this converter offers a promising solution for achieving high-efficiency energy transfer with significant voltage gain, making it suitable for a wide array of applications. © 2023 IEEE.