Modified isolated triple-active bridge bidirectional dc–dc converter for energy storage application

Abstract

The growing applications of environmental friendly green energy sources, hybrid electric vehicles, smart electrical energy grid, and energy storage have motivated the research world toward the bidirectional DC–DC converters. Among them, dual-active bridge (DAB) and triple-active bridge (TAB) are popular for smooth bidirectional high-power transferring capability. Both DAB and TAB operating with single-phase shift control (SPSC) suffer with the large circulating current and reduced soft switching operation. In this paper, a modified isolated triple-active bridge (MITAB) bidirectional DC–DC converter for high-power storage application has been proposed to improve the TAB converter performance by adding two extra switches and corresponding operation. The converter’s two output ports are connected in parallel to improve the power handing capability. Proposed converter operation with SPSC has been presented and also compared with the conventional TAB. The simulation results using PSCAD has been presented to verify the proposed converter operation.