Research on low frequency oscillation control strategy of PMSG-wind farm grid connected system

Abstract

Concerning the suppression of oscillation in PMSG wind farm, a constrained multi parameter collaborative optimization control strategy is established. Firstly, the integrated dissipation energy of PMSG wind farm is derived. Then the influence of control links, wind speed and location on the stability of wind power grid connected system is studied. On this basis, combined with the three oscillation states in the wind farm, the goal is to minimize the integrated dissipated energy of the wind farm. According to the influence law of parameters, the constraint conditions are formulated respectively, and the boundary conditions to ensure the steady-state operation of grid connected system are comprehensively considered. Finally, the model of IEEE 10-machine 39-bus system with PMSG wind farm is constructed in RTDS. Simulation results verify that, the proposed parameter optimization strategy can improve the power angle stability of the system.