双有源桥变换器中基于先进虚拟电阻补偿的瞬态直流偏置抑制

In dual active bridge (DAB) DC/DC converters, transient DC bias in the inductor current is produced due to variations in system parameters, leading to increased RMS value, core saturation, and potential instable operations. To mitigate this issue, we propose a transient DC suppression method based on advanced virtual resistance compensation (VRC). Small-signal analytical models are developed to characterize the proposed VRC-based approach. A compensation loop is then integrated into the control framework to enhance the DAB’s transient performance, dynamically adjusting the phase shift to emulate the transient behavior of real resistance compensation. Experimental results validate that the proposed method effectively suppresses the transient DC bias in the inductor current without introducing additional power loss or compromising power transmission capacity.