Decoupling Power Sharing Control Scheme with the Fast Dynamic Response for a Dual-input Dual-active-bridge DC-DC Converter Topology

The three-port triple active bridge (TAB) dc-dc converters have been extensively studied for some applications in renewable energy, electric and fuel cell vehicles. However, due to the coupling among the inductances of three ports, the modulation calculation and the model-based control design become very difficult. Therefore, by reducing a redundant inductance, a dual-input dual-active-bridge (DAB) dc-dc converter is presented in this article. Then, the power coupling among these three ports can be reduced significantly, which is beneficial to realize the flexible power management of the three-port structure. Thus, a decoupling power-sharing control scheme with fast-dynamic response is proposed for this dual-input DAB dc-dc converter. The effectiveness of the proposed control scheme is verified using the simulation and experimental results obtained from a 250 W hardware prototype.