Brushless doubly-fed induction generator (BDFIG) cancels brushes and slip rings with special structure design

and thus has high reliability

but has obvious saturation characteristics. In recent BDFIG studies

the saturation impact is usually ignored

and the control design of brushless doubly-fed shaft generation assumes of constant BDFIG parameters. Taking the key current closed-loop relation of brushless doubly-fed shaft generation system as the basis

the frequency domain closed-loop performances during inductance parameter drift under under different saturation are analyzed. Based on the influence of parameter drift on current-loop width and decoup ling degree

the control parameter optimization method is proposed

which can guarantee parameter robustness and dynamic stability at the same time and improve the generation performance in whole operating range. The results show that under the typical 975 r/min light-load to full-load condition

without control parameter optimization

the inductance parameter drift decreases the dynamic response speed

and the oscillation is obvious

while after optimization

the saturated-state control performance maintains as the unsaturated one.