Transient Synchronization Stability of Grid-Tied Multi-VSCs System Considering Nonlinear Damping and Transient Interactions

This article investigates the phase-locked loop (PLL) synchronization transient stability (PLL-STS) issue of grid-tied multiple voltage source converters (MVSCs) systems, specifically focusing on transient stability evaluation and transient interaction analysis. First, a novel PLL-STS assessment met...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2024-12, Vol.39 (12), p.16775-16791
Main Authors: Wang, Zhi, Guo, Li, Li, Xialin, Wang, Zhongguan, Zang, Xiaodi, Zhu, Jiebei, Zhou, Xu, Wang, Chengshan
Format: Article
Language:English
Subjects:
Converters
Grid-tied multiple VSCs
Numerical stability
Phase locked loops
phase-locked loop synchronization transient stability (PLL-STS) assessment method
Power conversion
Power system stability
Stability criteria
static and dynamic interaction
Transient analysis
transient synchronization stability
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Summary:This article investigates the phase-locked loop (PLL) synchronization transient stability (PLL-STS) issue of grid-tied multiple voltage source converters (MVSCs) systems, specifically focusing on transient stability evaluation and transient interaction analysis. First, a novel PLL-STS assessment method for MVSCs systems has been proposed, which considers angular frequency jumps, nonlinear damping, and transient interactions among VSCs. Compared with previous studies, this method can accurately evaluate PLL-STS of MVSCs system since the acceleration and deceleration areas of VSCs can be accurately determined by combining equal-area criterion and numerical integration method. Moreover, it can identify the dominant converters which lead to transient instability. Second, by introducing static and dynamic interaction coefficients, influence of static and dynamic interaction on the transient stability of individual converters is quantitatively analyzed. Finally, the theoretical analysis results are verified by PSCAD/ EMTDC time-domain simulation results and RT-LAB hardware-in-the-loop experimental results.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2024.3445352