VOLTAGE CONTROL IN A DOUBLY-FED INDUCTION GENERATOR WIND TURBINE SYSTEM

摘要

Systems and methods for regulating voltage in a doubly fed induction generator(DFIG)system are provided. More particularly, the voltage of the auxiliary powerfeed in a DFIGwind turbine system can be regulated by outputting reactive power from a powerconverter to a reactive element coupled between the auxiliary power feed and astatorbus. The reactive element can include a winding of the transformer used tocouple thewind turbine system to the electrical grid and/or an inductive element coupledbetweenthe output of the power converter and the stator bus. The voltage of theauXiliary powerfeed can be maintained within a reduced operating range while an increasedoperatingrange can be provided for wind turbine system.