Wind turbine is a wind energy conversion power machinery mechanical work. Broadly speaking, the wind turbine is based on the sun as a heat source to heat the atmosphere as the working fluid to convert vane generators. Most of the current induction generator wind turbine must be connected to the grid in order to produce excitation and thus generate electricity. Early wind farm is a small constant speed wind turbines, and the network of its relatively simple, because the induction motor can be easily obtained naturally slide relatively large damping, so that only a relatively small increase in the rated power can be generated good results. Because of this, it is bound to suffer from the reactance of energy storage and release latency and network with the contradiction between the instantaneous. But now this problem has been resolved, we can absorb the energy storage chokes way to limit the circuit voltage increases. Wind farms connected to the grid, there are two ways, one way and in accordance with the previous network, one wind farm for its energy reserves is still very small, and put its power to widely distributed, and expand access to certain sexual a regional power grid, at the same time will be able to accommodate consumption; Second, higher density in the wind resource area to develop wind farms, transmission through the transmission lines to be seen. The face of a single unit power grid reserves and in the number of units needed more and more wind power after running more obvious impact on the grid to study the stability has become a topic of concern  .