Simulation of Doubly Fed Induction Generator

in recent years, wind energy has become one of the most important and promising sources of renewable energy, which demands additional transmission capacity and better means of maintaining system reliability. The wind energy conversion systems are connected to the grid through Voltage Source Converters (VSC) to make variable speed operation possible. The studied system here is a variable speed wind generation system based on DFIG using MATLAB Simulation. DFIG is the hybrid version of the Induction Generator. In the DFIG no extra auxiliary equipment is required to compensate the reactive power because the design of DFIG is such a way that reactive power is compensate by the Rotor Side or Grid Side Converter. The rotor side converter (RSC) usually provides active and reactive power control of the machine while the grid-side converter (GSC) keeps the voltage of the DC-link constant. Results show that the DFIG can work at variable speed; it gives the optimum output at respective speed. But induction generator only works at fixed speed. The power output is more reliable in DFIG. In induction generator capacitor bank or STATECOM is used for compensate the reactive power. In DFIG there is no need of such equipment's for compensating the reactive power. DFIG is more stable at Transient Fault Condition than IG.