With the great development of clean energy resources in Xinjiang’s power grid

the scale development and construction is strengthened in nine wind regions of Xinjiang. The wind power still maintains in the fast increase tendency and shows such development mode as "centralized development and long-distance transmission". The rapid development of wind power has more strict requirements to the wind turbine in such aspects as performance and quality. Therefore

for studying the influence of one large wind farm on the power system after connection

in this paper

the equivalent impedance of cabinet transformer and wire is obtained on the basis dynamic mathematical module of single unit double feed wind generator

the actual simulation of four sets of variable speed constant frequency double-feed wind turbine and also by way of theoretical deduction. The equivalent module of double-feed wind turbine is set up. A certain wind farm in Xinjiang is taken as an example

the actual simulation module and equivalent module of the wind turbine are simulated in MATLAB/SIMULINK software at different wind velocity conditions. It can be seen from the simulation result that the simulation curve of equivalent module of the wind farm and that of the actual module are basically in complete coincidence

thus the correctness of the equivalent module is verified.