中圖分類號: TP29,;TM464 文獻標識碼: A DOI:10.16157/j.issn.0258-7998.222919 中文引用格式: 陳曉彤,,孫正,羅利文. 一種可適應復雜網壓條件的快速鎖相環(huán)[J].電子技術應用,,2022,,48(12):74-78. 英文引用格式: Chen Xiaotong,Sun Zheng,,Luo Liwen. A fast PLL which can adapt to complex grid voltage conditions[J]. Application of Electronic Technique,,2022,48(12):74-78.
A fast PLL which can adapt to complex grid voltage conditions
Chen Xiaotong1,,Sun Zheng2,,Luo Liwen1
1.School of Electronic Information and Electrical Engineering,Shanghai Jiaotong University,,Shanghai 200240,,China; 2.SAIC Motor Corporation Limited,,Shanghai 200041,,China
Abstract: Phase-locked loop(PLL) based on dual second-order generalized integrator(DSOGI-PLL) is widely used in inverter synchronous grid-connection. However, when the power grid voltage is unbalanced or harmonic components and DC offset exists, namely, when the grid voltage condition is complex, DSOGI-PLL has a large deviation from the frequency. Therefore, an improved structure is proposed. The DC component suppression module is added to filter the DC voltage, and the low-pass filter is added to improve the ability of the PLL to suppress harmonic voltage, and accurately extract the grid voltage synchronization signal. The simulation results in MATLAB/Simulink verify that the PLL can filter out the harmonic component and DC component, and the effect is better.
Key words : second-order generalized integrator;phase locked loop,;harmonic,;DC offset,;unbalanced voltage