An Ultra-High Gain Compact Module Bidirectional DC–DC Converter for Energy Storage System

Abstract

This paper presents a non-isolated bidirectional dc-to-dc converter (BDDC) topology employing a switched inductor switched capacitor (SISC) module. The bidirectional power flow capability aid to its application mainly in microgrids and electric vehicles. The switched inductor (SI) and switched capacitor (SC) cells in combination assist in the generation of high gain voltage without using a bulky transformer. The theoretical analysis of the proposed converter, its gain calculation, and small signal analysis are analyzed in detail. It benefits from having a wide voltage-gain range and less voltage stress across the power switches. Also, the proposed (SISC-BDDC) can operate both in boost and buck modes. Simulations are carried out for both the modes using MATLAB/Simulink platform. A 200 prototype is also developed to operate with $V_{\mathrm {in}}$ = 12 V and $V_{\mathrm {out}}$ = 160-200V. Using the dSPACE1104 control platform, the maximum efficiency of 95.25% of the converter is justified in steady and transient operating conditions.

Keywords

• Bidirectional dc-dc converter
• hybrid energy sources
• switched-capacitor
• switched-inductor