Ahead of Print article ยท Journal article
Large-Signal Grid-Synchronization Stability Analysis of PLL-Based VSCs Using Lyapunov's Direct Method
Grid-synchronization stability (GSS) is an emerging stability issue of grid-tied voltage source converters (VSCs), which can be provoked by severe grid voltage sags. Although a qualitative understanding of the mechanism behind the loss of synchronization has been acquired in recent studies, an analytical method for quantitative assessment of GSS of grid-tied VSCs is still missing.
To bridge this gap, a dedicated Lyapunov function is analytically proposed, and its corresponding stability criterion for GSS analysis of grid-tied VSCs is rigorously constructed. Both theoretical analysis and simulation result demonstrate that the proposed method can provide a credible GSS evaluation compared to the previous EAC/EF-based method.
Therefore, it can be applied for fast GSS evaluation of the grid-tied VSCs as is exemplified in this letter, as well as an analytical tool for some GSS-related issues, e.g., GSS-oriented parameter design and stabilization control.
Language: | English |
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Publisher: | IEEE |
Year: | 2022 |
Pages: | 788-791 |
ISSN: | 15580679 and 08858950 |
Types: | Ahead of Print article and Journal article |
DOI: | 10.1109/TPWRS.2021.3089025 |
ORCIDs: | 0000-0002-5322-0168 , Zhang, Chen and 0000-0002-1621-2257 |