Application of Static Var Compensator (SVC) with fuzzy controller for grid integration of wind farm

Large-scale integration of wind turbine generators (WTGs) may have significant impacts on power system operation with respect to bus voltages, system frequency, etc. Voltage control and reactive power compensation in a weak distribution network for integration of wind power represents the main concern of this paper. Without reactive power compensation, the integration of wind power in a network may potentially cause voltage collapse in the system and under-voltage tripping of wind power generators. This paper shows that while static compensation (Fixed Capacitor Bank) is unable to prevent voltage collapse, dynamic reactive power compensation using Static Var Compensator (SVC) at the a point of interconnection of wind farm is successful in maintaining acceptable voltage level. Moreover, this paper shows that by using a fuzzy controller instead of a PI controller, the performance of SVC is improved. MATLAB/Simulink based simulation is utilized to demonstrate the application of SVC in wind farm integration and the enhancement in performance achieved with a fuzzy controller as compared to a Proportional Integral controller for voltage regulation during fault scenarios.