Power Quality Improvement in Grid Connected Wind Energy System Using Fuzzy Controlled Upqc

Wind power generation is grasping more attention nowadays because it offers the benefits of reduced cost, increased efficiency, less pollution and so on. But the known disadvantage is that the integration of wind farm with grid leads to many power quality problems such as voltage sag, swell, unbalance, harmonics, flickers etc. This paper concentrates mainly on diminution of source voltage sag and load current harmonics which are caused mainly due to the use of nonlinear loads such as personal computers, variable frequency drives, SMPS, monitors, printers etc in both industrial and commercial sectors. For the betterment of power quality issues, custom power devices are used. Among many of the custom power devices, Unified Power Quality Conditioner (UPQC) have been used nowadays which diminishes both voltage sag and current harmonics. The performance of UPQC can be improved by using a new strategy of control which is implemented using Fuzzy Logic Controller and from the simulation results, the performance of fuzzy controlled UPQC is better which can be validated by comparing its performance with the conventional control of PI controller.