Implementation of Decoupling Power Flow Control System in Triple Active Bridge Converter Rated at 400V, 10kW, and 20kHz

Abstract

An autonomous DC microgrid system that uses a triple active bridge (TAB) converter as a power routing unit is proposed. A control system that can independently manage the current and voltage of each port is needed to construct the microgrid. This paper describes how the decoupling power flow control system is implemented in the prototype TAB converter rated at 400V, 10kW, and 20kHz. The validity of the system was demonstrated by measuring the step response of the TAB converter. The experimental results showed that the system provided the designed dynamic characteristics from the viewpoints of output current control and constant voltage control. Decoupling power flow control between each port was also achieved.