Single-phase AC-DC-AC converter systems are widely used in the fields of rail transit, wind power generation, and marine propulsion. This paper focuses on single-phase AC-DC-AC converters, addressing issues such as low-frequency voltage ripple inherent in these converters that lead to reduced power quality on the AC side of the system and increased peak-to-peak and RMS values of the inductor current in the intermediate dual active bridge (DAB) converter. To mitigate the impact of ripple components on the converter, a DAB control strategy based on constant power transfer is proposed. Finally, a 300W prototype platform was constructed, and the proposed control strategy was implemented using Verilog HDL programming language. Using the proposed control strategy, static and dynamic experiments were conducted, and multiple comparative experiments with traditional control methods were performed. The results validate that the proposed control strategy effectively suppresses the impact of ripple on the converter, thereby improving grid-side power quality, enhancing system stability, and in-creasing transmission efficiency.