Sub/sup-Synchronous Oscillation Suppression Strategy of PMSG Wind Farm Based on Power Adjustment
In recent years,the sub/sup-synchronous oscillation(S/SSO)problem has seriously affected the safe operation of power system.This paper establishes the impedance model of wind farm based on the actual collecting network structure,considering the different unit operating conditions,and obtains the difference analysis of the contributing factors of different wind turbines to the actual oscillation of the grid-connected system.Through the analysis of the impact of the change of the actual wind farm wind turbine operating state on the system admittance model,a power adjustment-based oscillation elimination strategy after the oscillation accident is proposed.The proposed oscillation recovery strategy can eliminate oscillations while maintaining the output level of the direct drive wind farm is validated in the simulation of MATLAB/Simulink.