The traction drive system without industrial frequency transformer is the trend and effective lightweight solution of high-speed train in the future. Cascade H-bridge rectifier has become the preferred solution for the front end of this technology due to its modular structure and simple control. In this paper, the working principle of single-phase cascaded H-bridge rectifier is analyzed, and an improved transient direct current control method without phase-locked loop (PLL) is proposed. The command current signal is calculated by the relation of instantaneous power to voltage and current in the two-phase stationary coordinate system to realize the tracking control of the grid current to the voltage. On this basis, aiming at the DC-link voltage imbalance caused by unbalanced loads, a voltage balancing control method without PLL is proposed. Simulation results show the effectiveness of the proposed method.


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    Title :

    Transient Direct Current Control of Single-Phase Cascaded H-Bridge Rectifier Without Phase-Locked Loop


    Additional title:

    Lect. Notes Electrical Eng.


    Contributors:
    Jia, Limin (editor) / Qin, Yong (editor) / Liu, Baoming (editor) / Liu, Zhigang (editor) / Diao, Lijun (editor) / An, Min (editor) / Ding, Juxia (author) / Li, Qunzhan (author)

    Conference:

    International Conference on Electrical and Information Technologies for Rail Transportation ; 2019 ; Qingdao, China October 25, 2019 - October 27, 2019



    Publication date :

    2020-04-08


    Size :

    9 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English