Analysis on Small-Signal Stability of High Permeability Wind Power System Considering Wake Effect

A complete linearized model of DFIG (doubly fed induction generator) is established using PMT (plug-in modeling technique). Considering the influence of the wake effect on the wind speed of wind turbines in the downwind direction of the wind farm, the equivalent wind speed of wind turbine nodes is corrected. The eigenvalue analysis method is used to analyze the small-signal stability of the multimachine system. The influence of the increase of wind power permeability rate and wake effect on the small signal stability of the system is studied. The results show that the wake effect decreases the system stability and has a greater impact on the DFIG-dominated oscillation modes; different types of oscillation modes have different trends of damping ratios when the proportion of wind power is increased.