Strategy and Simulation of Grid Operation of Brushless Double-feed Wind Generator

In order to make growth of the service life and improve its reliability in double-feed machine,synchronized mathematical model through the winding coordinate transformation among rotor,power and control coordinates in d-q axis model,and brushless double-feed motor mathematical model is given.The simulation results show that :in the course of the grid,by changing the excitation current size,power side output voltage amplitude is adjusted,and VSCF is achieved.