Grid-connected joint optimization control system of large-scale doubly-fed wind generator

The invention discloses a grid-connected joint optimization control method of a large-scale doubly-fed wind generator. Real-time control on a rotor magnetic linkage is achieved according to a q-axis control signal given value U*Psiqr of the rotor magnetic linkage and a d-axis control signal given value U*Psidr of the rotor magnetic linkage, and meanwhile, real-time control on a pitch angle of a wind turbine is achieved according to a given control quantity Beta*ref of the pitch angle of the wind turbine. The invention relates to a grid-connected joint optimization control system of a large-scale doubly-fed wind generator, the system has the advantages that transient stability of a power system can be improved, voltage drop at a stator end of the doubly-fed wind generator during a grid fault can also be greatly reduced, and system stability is ensured.