ENHANCEMENT OF POWER QUALITY IN GRID-CONNECTED DOUBLY FED WIND TURBINES INDUCTION GENERATOR

Wind power technology is expanding rapidly, more and more wind farms are being connected to the power systems. Incorporation of large scale wind farms presents various challenges that must be tackled, such as system operation and control, stability, reliability and power quality. Power quality problems such as voltage flicker and harmonic distortion due to non-linear loads, sags due to faults are some major issues considered in this paper. Doubly fed Wind turbine induction generator connected to a grid is analyzed using MATLAB/ SIMULINK. Owing to continuously varying wind speed components, the active and reactive power along with terminal voltage fluctuates unremittingly. The proposed wind electric generators use good control techniques to extract maximum power at the every available speed and to mitigate harmonics and other power quality issues.