Empirical analysis on model and parameters of grid-connected Direct-driven Wind Turbine Generators in transient stability computation

The precision of model and parameter of Wind Turbine Generator are of crucial importance for the research on the influence of grid-connected wind power generation on power grid. In order to research dynamic behaviour of grid-connected Direct-driven Wind Turbine Generator(DWTG) during large disturbance and obtain parameters of DWTG that can reflect actual condition. Large scale disturbance test located in Jiuquan wind power base in Gansu Province is performed by the Northwest of China Power Grid Company. Base on disturbance test data of wind farm, applying the Electromechanical transient model of DWTG in Power System Analysis Software Package (PSASP) platform, the empirical analysis on model and parameters of DWTG simulation is conducted. By full use of the improved control strategy of the DWTG model, key parameters of the wind turbine are proposed and the sensitivity analyses on them are carried out. According to on-site testing data, related parameters of the simulation platform are modified to make the simulation curve more approximating to the measured curve, thus the precision of DWTG model is improved.