No-load grid connection strategy research of DFIG based on close loop of voltage

Traditional wind power generation can lead to high impact current extremely when wind generators are connected with grid, it will be harmful of generators and grid. According to analysisting characteristic of double-fed induction generator(DFIG), and the dynamic mathematical model of on-load grid connection, control technique of closed loop of voltage which is based on stator flux orientation is used in DFIG skillfully. Simulation of on-load grid connection of DFIG is established by matlab, and an experimental platform of a 5KW DFIG is builded. The process of no-load grid connection is simulated and tested. The results indicate that the control technique which can reduce grid impact effectively, is an ideal type of grid connection.