Voltage Sag Compensation by DVR for DFIG Wind Turbine System

Abstract

This paper describes the dynamic voltage restorer for maintaining the grid codes to be followed by the doubly fed induction wind turbine system. Because of extended power handling properties of power electronics devices, it is been used widely in the Electrical Devices. The extensive usage of power electronic devices has raised the problem of power quality issues, resulting into the problem of voltage sag/swell etc. The system to be designed will face the problems of voltage sag/swell & will keep the system healthy throughout the symmetrical & unsymmetrical fault conditions. This will also avoid the nuisance tripping of highly sensitive relays & will also maintain synchronism of power system. The use of doubly fed induction generation system is done to maintain the constant voltage to frequency output irrespective of wind velocity.