Recent development and future trends of resonance in doubly fed induction generator system under weak grid

In recent years, the wind energy conversion system faces significant challenges for stable and secure operations, especially in weak grid due to high penetration of into grid. Doubly fed induction generator (DFIG) is one most popular turbine generators its cost-effective variable speed low-cost partial size power converter. Impedance interaction between series or parallel compensated DFIG causes sub-synchronous resonance (SSR) high-frequency (HFR). A comprehensive review state-of-the-art SSR HFR under a presented. First, based on features, such as supplementary hardware, linear non-linear control strategies, damping techniques are classified different types. Then, advantages disadvantages analysis put forward. Moreover, latest development supplemented. Finally, contemporary future trends discussed.