Application of STATCOM for Transient Stability Improvement and Performance Enhancement for a Wind Turbine Based Induction Generator

Voltage stability is a key issue to achieve theuninterrupted operation of wind farms equipped with squirrel cageinduction generators (SCIG) during grid faults. A StaticSynchronous Compensator (STATCOM) is applied to a powernetwork which includes a SCIG driven by a wind turbine, for steadystate voltage regulation and transient voltage stability support. TheSTATCOM is controlled by using PQ controller technique withvoltage regulation as basic scenario. The system is implementedusing MATLAB/ SIMULINK. Results illustrate that the STATCOMimproves the transient voltage stability and therefore helps the windturbine generator system to remain in service during grid faults.The time to reach steady state torque and speed without usingvector control or direct torque control can also be achieved by usingthis STATCOM control technique.