A novel transient rotor current control scheme of a doubly-fed induction generator equipped with superconducting magnetic energy storage for voltage and frequency support

Shen Yang-Wu^a), Ke De-Ping†^a), Sun Yuan-Zhang^a), Daniel Kirschen^b), Wang Yi-Shen^b), Hu Yuan-Chao^a)

Structure of the DFIG-SMES. Here, P _r and Q _r are rotor output active power and rotor reactive power, respectively; P _s and Q _s are stator output active power and rotor reactive power, respectively; P _sr and Q _sr are the output active and reactive power of GSC, respectively; P _grid and Q _grid are the total output active and reactive power of DFIF, respectively; P _ESD is the absorbed power by ESD; U _dc is dc-link capacitor voltage.