A STATCOM P-Q Controller for a PMSG Wind Energy System

This paper studies the role of permanent magnet synchronous generator (PMSG) wind turbine system and STATCOM for reactive power compensation during sudden wind speed variation and torque pulse. A detailed model of the PMSG along with the dynamics of the converters have been included. DC link capacitor voltage of the back-to-back converter needs to be maintained within strict limits for smooth power transfer in the system. The STATCOM is placed at the terminal of the grid side converter. An independent P-Q controller is designed for STATCOM to provide the necessary reactive power to regulate DC link capacitor voltage and avoid instability. The simulation studies have shown that the proposed controller provides good damping and settles the transients satisfactorily following the disturbances.