Grid connected Fixed Speed Wind Turbines (FSWT) may cause voltage stability problems which results in islanding of the generator from the grid. Voltage stability is a major issue to achieve the uninterrupted operation of wind farms equipped with FSWTs. In this paper, the stability improvement of induction generator based wind turbine systems has been studied.Voltage control and reactive power compensation withFSWTsystem represents main concern of this paper. Static Var Compensation can be utilized to regulate voltage, control power factor, and stabilize power flow in Wind Energy Conversion Systems (WECS) with FSWTs. Flexible AC Transmission Systems (FACTS) controller based on a Voltage Sourced Converter (VSC), known as Static Synchronous Compensator (STATCOM) has been proposed for stability improvement in wind farms with FSWTs. Hence in this paper, a 100 Mvar STATCOM employing Pulse Width Modulated (PWM) inverter is designed, analyzed and simulated in MATLAB/SIMULINK simulation software and the results are found to be satisfactory.

Keywords: Wind Farm, Induction Generator, Point of Common Coupling (PCC), Voltage Source Converter (VSC), FlexibleAC Transmission Systems (FACTS), Pulse Width Modulated (PWM) inverter.