Improved methodology for damping sub‐synchronous oscillation in a series‐compensated DFIG‐based wind farm

The interaction between the wind farm and series-compensated transmission line may lead to sub-synchronous oscillation (SSO) phenomenon which affects system stability equipment safety. Among presented methods for damping SSO phenomenon, supplementary controller (SDC) is most prevalent method because of its low cost, effectiveness, simplicity. In all previous studies, one input control signal fed SDC mitigating SSO. Here, two signals (active power reactive deviation) are applied enhancing quickly. ability proposed has not been investigated before. embedded into q-axis rotor-side converter (RSC) inner current loop. modified IEEE first benchmark model (FBM) used analyze performance under different compensation levels, variable speeds, (SSCI). Small-signal using eigenvalue approach carried out, where impact on mode, super-synchronous mode investigated. results successfully prove superiority various operating conditions compared some methods, least overshoot faster convergence have achieved by in studied cases.