In view of the subsynchronous resonance problem of the DFIG-based wind farm interfaced with series compensation system

in this paper

the battery charging supplementary damping control is introduced to suppress the subsynchronous resonance of the wind farm. Firstly

the conventional control strategy of battery charging system is analyzedand the small signal model of doubly-fed wind farm with battery charging is established. Then the eigenvalue method is used to analyze the system’s subsynchronous resonance mode and related participation factors. Based this basis

a battery charging supplementary damping control strategy with subsynchronous resonance suppression is designed. Finally

the PSCAD electromagnetic transient simulation model of the DFIG-based wind farm with battery charging interfaced with series compensation system is established. The time domain simulation method is used to verify the effectiveness ofthebatterychargingadditionaldampingcontroltosuppressthesubsynchronousresonance.