Bidirectional Power Flow Control in Triple Active Bridge Converters with Sensitivity Analysis

Triple Active Bridge (TAB) converters provide an efficient solution for multi-port power conversion, enabling simultaneous energy exchange among multiple sources and loads. Unlike conventional Dual Active Bridge (DAB) converters, which offer bidirectional power transfer but are limited to two ports, TAB converters enhance flexibility in applications such as renewable energy systems, electric vehicles, and aerospace power supplies by supporting multidirectional power flow. This paper presents an in-depth analysis of multi-directional power flow and sensitivity evaluation in a TAB converter, focusing on the impact of turns ratio and inductance variations on power transfer characteristics. Sensitivity analysis is conducted to quantify the influence of these variations on phase shift control, ensuring optimal power exchange under fluctuating operating conditions. A closed-loop power flow controller is developed to regulate power distribution across multiple ports. To validate the effectiveness of the proposed approach, a 3.5 kW system is carefully modeled in MATLAB/Simulink, demonstrating the robustness of the TAB converter in managing power flow across diverse operating conditions.