In this paper steady state characteristic of a variable speed Doubly fed induction generator (DFIG) is investigated. Torque and speed is used as design parameters for DFIG. From mathematical model it is found that on increase of rotor injection voltage and resistance, the torque speed response is shifted from over synchronous to sub synchronous range. The stability of DFIG operation is entirely...

This paper presents fuzzy logic control of Doubly Fed Induction Generator (DFIG) wind turbine in a sample power system. DFIG consists of a common induction generator with slip ring and a partial scale power electronic converter. Fuzzy logic controller is applied to rotor side converter for active power control and voltage regulation of wind turbine. Wind turbine and its control unit are describ...

This chapter presents the theoretical basics of the electric power generation using doublyfed induction drives in wind turbines. This type of drive is the most utilized in wind power plants nowadays. This is mainly due to its fast dynamic response and reduced power electronics on the rotor side. This latter aspect is responsible for less harmonic pollution in the network and reduced acquisition...

Brushless doubly-fed induction generators have higher reliability, making them an attractive choice for not only offshore applications but also remote locations. These machines are composed of two back-to-back voltage source converters: the grid side converter and rotor converter. The is typically used reactive current control power winding using current. A low ride through (LVRT) fault detecte...

With the change in the wind profile, the speed of doubly fed induction generator (DFIG) of wind energy conversion system (WECS) changes from super synchronous to sub synchronous range and vice versa. DFIG is operated to generate quality power; hence, power at rotor side is controlled using matrix converter taking power from grid and feeding back power to the grid depending on the wind profile. ...

The brushless doubly-fed machine (BDFM) has two stator windings with different pole numbers, supplied frequencies. Therefore, the distribution of magnetic fields in and rotor iron is complex. In addition, flux density non-sinusoidal a DC offset at natural speed. This makes use conventional hysteresis models utilised for sinusoidal impractical BDFM. this paper new model proposed BDFM based on sc...