According to the sub-synchronous resonance of DFIG(Doubly-fed Induction Generator) connected to series compensation transmission system,the transfer function is formulated via establishing a mathematical model of DFIG series compensated transmission system. PR control based on static rotor axis is used to suppress the sub-synchronous resonance. By transforming the sub-synchronous frequency component of the system current into αβ component that based on static rotor axis,the frequency of theαβ component can ...