Doubly fed induction generator for wind energy conversion system - A survey

This paper surveys the doubly-fed induction generator (DFIG) used in wind energy conversion systems (WECS). Most of the present day WECS is the variable speed type. The variable speed WECS generators are: synchronous generator (SG), permanent magnet synchronous generator (PMSG), wound rotor induction generator (WRIG) and DFIG. Of these, the DFIG is finding increasing attention in the use of WECS because of its requirement of partial rated converters and complete control of active and reactive power transferred.