Elaborates the development situation of wind power generation at home and abroad, and summarizes the technology research from aspects of large scale wind turbine, adjustable speed and power regulation, direct-drive permanent magnet generator and offshore wind power, etc. Taking the double-fed wind power generation system as the research object, establishes the simulation model by MATALAB/Simulink. The simulation result shows that the voltage, current and active power output waveforms of the wind power generation system fully meet the requirements of power design specification.