SSO of DFIG-based wind farm integrated by a hybrid series compensator

Doubly-fed induction generator (DFIG)-based wind farms integrated by series compensated transmission lines are confronting with the problem of subsynchronous oscillation (SSO). In this study, the configuration and control stratagem of hybrid series compensator composed of a static synchronous series compensator (SSSC) and a fixed capacitor are proposed, and the SSO of DFIG-based wind farm integrated by a hybrid series compensator are studied. The results reveal that the SSO risk of the system is lower by using the hybrid series compensator, and the SSO damping is larger with a higher proportion of SSSC in the hybrid series compensator, as well as with a larger compensation impedance or voltage of SSSC. The research is supposed to be helpful for the planning and operating of the power system with large-scale wind farms integrated