Constant frequency-unified power quality conditioner for wind turbine generator connected with micro grid

The paper proposes the application of constant frequency unified power quality conditioner to overcome the power quality issues in fixed speed wind mill connected with the micro grid. The power circuit of a constant frequency unified power quality conditioner (CF-UPQC) is based on a combination of UPQC, and frequency regulator (matrix converter). This equipment incorporates compensation functions like voltage sag, voltage swell, reactive power compensation, current harmonic rejection, and also provides frequency regulation. Integrated series and parallel active filter (UPQC) is a universal solution for the most power quality problems. The main drawback is that it cannot regulate the supply frequency variation. Here CF_UPQC the matrix converter is used for frequency regulation. This integration, the compensator compensates all the power quality issue for fixed speed induction wind generator. Simulation results are presented to confirm that this approach has better performance over the existing power quality conditioners for FSIWG connected with micro grid.