부산대학교 도서관

For dual-active-bridge (DAB) dc-dc converter, the disturbances of the output voltage caused by the measurement noises are inevitable in the model-based control (MBC) schemes. Compared with the MBC strategy, the single-voltage-loop control (SVLC) method has the ability to suppress the measurement noise and provide more stable output voltage. However, the SVLC method always results in slow dynamic response. To achieve excellent performance under both dynamic and steady state conditions, this paper proposes a hybrid control scheme to combine the advantages of the MBC strategy and the SVLC method. When the load disturbance happens, the MBC scheme is selected for maintaining the output voltage during the transits. Once the required output voltage is obtained, the dominant control scheme is switched to the SVLC method. Taking the direct-power-control (DPC) scheme as an example, some experimental results are showed to verify the effectiveness of the proposed hybrid control strategy.