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(fā)電機預(yù)同步控制策略

來源:電工電氣發(fā)布時間:2024-08-01 15:01 瀏覽次數(shù):182

基于直接電壓的虛擬同步發(fā)電機預(yù)同步控制策略

楊浩堂,秦斌
(湖南工業(yè)大學(xué) 電氣與信息工程學(xué)院,湖南 株洲 412007)
 
    摘 要:針對虛擬同步發(fā)電機(VSG)在并網(wǎng)瞬間產(chǎn)生沖擊電流的問題,提出一種基于直接電壓計算的預(yù)同步控制方法,通過直接獲取并網(wǎng)點兩端的電壓大小進行計算調(diào)制后,作為預(yù)同步的頻率補償量,無需鎖相環(huán)且輸出連續(xù),并且設(shè)計一個一階慣性環(huán)節(jié)緩解并網(wǎng)后由于預(yù)同步模塊退出導(dǎo)致的頻率跳變。在 MATLAB/Simulink 軟件搭建虛擬同步發(fā)電機并網(wǎng)仿真模型并進行實驗驗證,結(jié)果表明所提策略能有效降低并網(wǎng)前后頻率波動和電流沖擊。
    關(guān)鍵詞: 虛擬同步發(fā)電機;并網(wǎng);預(yù)同步;鎖相環(huán)
    中圖分類號:TM341     文獻標(biāo)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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