The DC bus ripple voltage of such system as energy storage

DC supply and single phase AC rectifying（such as railway traction system） etc has a direct threat to the stable operation of the system. On this basis

a kind of DC ripple suppressor and its direct voltage optimization control strategy are proposed and the proposed control strategy can be able to suppress ripple voltage as per the actual ripple voltage so to assure stability of the bus voltage. With comparison with other suppression device and control strategy

the topology proposed in this paper is simple and easy to achieve. Moreover

the proposed control strategy

compared to the traditional control strategy

reduces the calculation complexity and

at the same time

the system current transducer is not additionally installed and the site adaptability is much stronger. Both the correctness of theory analysis and effectiveness of the proposed control strategy are verified by the simulation and experimental result.