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)

Current control references during fault period: (a) stator voltage profile; (b) RSC current; (c) GSC current. Here, U _s and U _srated are the actual stator voltage and rated stator voltage of the DFIG, respectively; i _r is the rotor current, i _rd1, i _rq1, and i _rdem are the active current component, reactive current component, and demagnetizing current component of i _r, respectively; i _sr and i _srrated are the actual current and rated current of grid side converter, respectively; i _srd and i _srq are the d -axis component and q -axis component of i _sr, respectively.