The design of auxiliary power supply (APS) in solid-state transformers (SSTs) is quite challenging. To minimize the isolation requirement, this APS is usually powered by dc-link capacitors. However, it poses voltage unbalance issues when the main converter is not in operation. To address this problem, a compact and cost-effective APS design is proposed, which utilizes the isolation structure of main medium-frequency transformers (MFTs). The proposed APS system also provides half-duplex communication, which replaces the costly optical fiber system. The interference between main and auxiliary power transfer links has been significantly reduced by the decoupled transformer design and the dual-band scheme for inductor-inductor-capacitor (LLC) and inductor-capacitor-inductor-capacitor (LCLC) converters. In addition, a new startup strategy with a low standby power is applied to this APS system. A 3.2-kW SST prototype with a peak efficiency of 97.9% has been built, whose APS is 6 W. The experimental results verify the feasibility and performance of the proposed techniques.


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    Titel :

    A Compact Auxiliary Power Supply Design for a Medium Frequency Solid State Transformer


    Beteiligte:
    Liu, Xin (Autor:in) / Gao, Fei (Autor:in) / Xu, Junzhong (Autor:in) / Liu, Yuxin (Autor:in) / Khan, Muhammad Mansoor (Autor:in) / Yang, Xijun (Autor:in) / Rogers, Daniel J. (Autor:in) / Liu, Dong (Autor:in)


    Erscheinungsdatum :

    01.03.2023


    Format / Umfang :

    6041967 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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