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To ensure safe and reliable operation of power system based on wind energy, usually plant operators should satisfy grid code requirements such as grid stability, fault ride through (FRT), power quality improvement, grid synchronization and power control etc. To satisfy the grid code requirements of wind turbine, usually grid side converter is playing a major role. So in order to improve the operation...
This paper studies the impacts of grid voltage swell on the dc-link voltage for doubly fed induction generator (DFIG). A flexible algorithm of the dc-link voltage is proposed to meet the requirements of wide variation in grid voltage. The dc-link voltage reference is regulated with the variation of grid voltage. Thus, the dc-link voltage is maintained to a constant during normal operation but a relatively...
This paper presents a control method that reduces the pulsating torque and dc voltage problems of a Doubly Fed Induction Generator (DFIG)-based wind turbine system. To reduce the torque and the power ripple, a current control scheme, consisting of a proportional integral (PI) controller, is presented in a positive synchronously rotating reference frame and is capable of providing a precise current...
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