Probabilistic Assessment of Sub-Synchronous Oscillation Induced by Grid Integration of Large-Capacity Permanent Magnet Synchronous Generators Through Flexible DC Transmission
Addressing frequent sub-synchronous oscillations(SSO)in multi-terminal VSC-HVDC integrated offshore wind clusters,a probabilistic assessment method using the Weibull distribution and a Leaky Least Mean Squares algorithm is proposed to explore SSO dynamics in large-capacity direct-drive wind farms.Findings reveal that increased wind speeds shift SSO frequencies from 40 Hz to around 18 Hz,and the cumulative probability of negative damping ratios rises from 14%to 90%.More turbines and multi-terminal integration expand the SSO frequency range and reduce negative damping cumulative probabilities by 1%～8%,offering guidance for large-scale offshore wind integration.
permanent magnet synchronous generatorflexible direct current transmissionsub-synchronous oscillationsmall-signal modeling
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