Behavior of PMSG Wind Turbines with Active Crowbar Protection Under Faults

Permanent Magnet Synchronous Generators have become widely used for variable speed wind power system due to their features compared to other generators used for wind energy conversion systems. Dynamic interaction between PMSG wind turbine and grid which subjected to disturbances like faults is a valuable issue. To prevent a cascading effect because of lack of power from wind turbine, it must still be connected to grid during abnormal conditions. Active crowbar is used for improving the fault ride-through" FRT" capability. In this paper the impact of resistance value on the stability for PMSG, DC link voltage, three phase currents, Iq, Id, P, Q and rotor speed has been investigated. Simulation and results are done using variable speeds and symmetrical faults by MATLAP /SIMULINK.

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