Decoupling power flow control system in triple active bridge converter rated at 400 V, 10 kW, and 20 kHz

Abstract

An autonomous DC microgrid system that uses a triple active bridge converter as a power routing unit is proposed. A control system that can independently manage the transmission power between each port is needed to construct the microgrid. This paper describes how the decoupling power flow control system is implemented in the prototype triple active bridge (TAB) converter rated at 400 V, 10 kW, and 20 kHz. The validity of the system was demonstrated by measuring the step response of the TAB converter. The experimental waveforms of the prototype show that the transmission power of each port converges to the command value independently within the specified integral time constant T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">i</sub> = 15 ms.