Study of a sensorless algorithm behaviour in the grid connection process of the Doubly-Fed Induction Machine

摘要

In the present paper the behaviour of a sensorless position algorithm based on axes transformation during the grid connection process of the doubly fed induction generator (DFIG)-based wind energy generation system has been studied. The sensorless algorithm has been tested in all the different stages, from acceleration, through grid connection to active power extraction. A new grid synchronization method without position sensors is proposed. The influence of the position estimation error in the grid connection process has also been analyzed.