Effects of main and leakage flux saturation on the transient performances of doubly-fed wind driven induction generator

Abstract

Doubly-fed induction generators are gaining more attention especially in the field of wind power generation due to their many advantages and the rapid development in both power electronics and control strategies. In this paper, a new saturated doubly-fed induction generator model is proposed. This model takes into account both main flux saturation and leakage flux saturation. The effect of the main flux saturation and the leakage flux saturation on the determination of the transient performances of doubly-fed induction generator under different transient conditions such as step change in input power, voltage sag and short-circuit at the terminals is the main objective of this paper. It has been demonstrated that although the inclusion of the main flux saturation in the generator modelling is important, the effect of the leakage flux saturation is the most dominant in the determination of the transient performances in the first few cycles following the transient.