Research on the Impact of Voltage Stability of Power System With The Direct Drive Wind Farm

Wind power is the most widely used as new energy generation method, it is of great significance to manage the atmospheric haze, adjust the energy structure and transform the mode of economic development. Permanent magnet direct-drive type fan as the new generation of wind power generation system, and the traditional asynchronous and doubly-fed fan has different features, which has good stability, high efficiency and controllable active power and reactive power has higher rate in real wind farm, with the increasing number and size of the grid wind farms, and its impact on the system become important factors that affect the power system stable operation .A static analysis of flow calculation method based on the direct-drive wind farm cause power system voltage instability, and use Matlab/simulink simulation software research wind farm with grid three-phase short circuit occurs and in the large wind disturbance that the transient voltage stability of the grid. The results provide important theoretical for the safe and stable operation of the wind farm.