DC link series resonant converter based slip power recovery scheme - an implementation

Slip Power Recovery Scheme (SPRS) is popular as a Variable Speed Drive (VSD) for Wound Rotor Induction Motor (WRIM) and as a Variable Speed Constant Frequency Doubly Fed Induction Generator (VSCF-DFIG). In this work an attempt is made to reduce some of the drawbacks of SPRS by using DC Link Series Resonant Converter (DCLSRC). The implementation of SPRS using DCLSRC is verified through simulation. The results show that the rotor current is maintained almost sinusoidal over a wide speed range. Hence the rotor current harmonics and the related effects are reduced. The proposed scheme also provides a procedure to integrate the three single phase ac to dc converters for connection to three-phase mains.