Abstract
In order to effectively utilize the large amount of regenerative braking energy generated by railroad locomotives, merged the advantages of modular multilevel converter (MMC) in medium and high voltage applications, a railway braking energy feedback device and its control method based on MMC topology are proposed. The operation principle and topological structure of the braking energy feedback device are analyzed, the corresponding control methods are given for the rectifier and inverter links, it could save the cost of transformer, improve the quality of grid current effectively, and achieve the rational recycling of regenerative braking energy. Finally, a simulation model is established to verify the feasibility and effectiveness of the proposed braking energy feedback device and control method.
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