Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 7, Pages 7572-7576Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3153283
Keywords
Synchronization; Power system stability; Thermal stability; Stability criteria; Transient analysis; Power system dynamics; Power electronics; Grid-following (GFL) control; interaction; synchronization stability; voltage-source converter (VSC)
Categories
Funding
- National Natural Science Foundation of China [51877159]
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In this study, a cascading synchronization instability phenomenon in a multi-VSC grid is reported. It is found that both static interaction and dynamic interaction can affect the synchronization stability during the fault transient. Simulation and experimental results confirm the analysis.
In this letter, a cascading synchronization instability phenomenon is reported in a multi-voltage-source-converter (VSC) grid. By adopting the equal area criterion, it is revealed that during the fault transient, there is static interaction that increases equivalent mechanical power for the original stable-operating VSC. Due to the fast power angle swing of the unstable VSC, there is nonnegligible dynamic interaction, which may decrease its synchronization stability margin. The effect of system parameters on synchronization stability is studied, and the simulation and experimental results verify the analysis.
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