Modelling and Simulation of Grid Side Control of DFIG Using Fuzzy and PI

Now a days wind power energy is playing a major role in power industry. With the raise in application of the wind power variety of topologies are emerging into picture. Within the various types of adjustable speed fixed frequency topologies DFIG is most preferred type because of its efficiency as well as capability to allow wide range of speed variance at simplified converter size. Doubly Fed Induction Generator (DFIG) is actually a wound rotor induction generator which can be implemented to fed electrical power via both stator plus rotor circuit. Stator feeds power straight to grid that is unidirectional. Rotor circuit is linked to a bidirectional ac/dc/ac converter acquiring a common dc link bus. In rotor, power circulation is bidirectional i.e. based on the method of procedure the power flow is whether from rotor side to grid or it may be via grid side to rotor. The main performance of the grid voltage converter is to continue to keep the DC link voltage constant that eventually fed a constant amplitude ac voltage towards rotor side for maintaining the flux constant. With this paper a study and comparison of various control strategies PI, FUZZY of DFIG utilized in a wind power conversion process /generation systems is detailed. In the following paper these two control strategies of grid side is studied and the response regarding each strategy is detailed making use of MATLAB/SIMULINK.