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    Suzhou Electric Appliance Research Institute
    期刊號: CN32-1800/TM| ISSN1007-3175

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    基于直接電壓的虛擬同步發電機預同步控制策略

    來源:電工電氣發布時間:2024-08-01 15:01 瀏覽次數:11

    基于直接電壓的虛擬同步發電機預同步控制策略

    楊浩堂,秦斌
    (湖南工業大學 電氣與信息工程學院,湖南 株洲 412007)
     
        摘 要:針對虛擬同步發電機(VSG)在并網瞬間產生沖擊電流的問題,提出一種基于直接電壓計算的預同步控制方法,通過直接獲取并網點兩端的電壓大小進行計算調制后,作為預同步的頻率補償量,無需鎖相環且輸出連續,并且設計一個一階慣性環節緩解并網后由于預同步模塊退出導致的頻率跳變。在 MATLAB/Simulink 軟件搭建虛擬同步發電機并網仿真模型并進行實驗驗證,結果表明所提策略能有效降低并網前后頻率波動和電流沖擊。
        關鍵詞: 虛擬同步發電機;并網;預同步;鎖相環
        中圖分類號:TM341     文獻標識碼:A     文章編號:1007-3175(2024)07-0011-05
     
    Direct Voltage-Based Pre-Synchronization Control Strategy for
    Virtual Synchronous Generators
     
    YANG Hao-tang, QIN Bin
    (College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China)
     
        Abstract: Aiming at the problem of the virtual synchronous generator (VSG) generating impulse current at the moment of grid connection,a pre-synchronous control method based on direct voltage calculation is proposed, in which the voltage magnitude at the two ends of the grid connection point is obtained directly and modulated for calculation, which is used as the frequency compensation for pre-synchronization,with no need for phase-locked loop and with continuous output, and a first-order inertia link is designed to mitigate frequency jumps due to the withdrawal of pre-synchronization module after grid connection. Finally, a virtual synchronous generator grid connected simulation model is constructed in MATLAB/Simulink to verify that the proposed strategy effectively reduces the frequency fluctuation and current impulse before and after grid connection.
        Key words: virtual synchronous generator; grid connection; pre-synchronization; phase-locked loop
     
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