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This paper implements of a three phase grid synchronization for doubly-fed induction generators (DFIG) in wind generation system. A stator flux oriented vector is used to control the variable speed DFIG for the utility grid synchronization, active power and reactive power. Before synchronization, the stator voltage is adjusted equal to the amplitude of the grid voltage by controlling the d-axis rotor...
This paper presents a vector control of grid-connected three-level neutral point clamped voltage source converter (3L-NPC-VSC) connecting doubly-fed induction generator (DFIG) drives for variable-speed wind power generation. The control algorithm of the grid-connected 3L-NPC-VSC applies the concepts of the decoupled vector control method, which provides independent control active and reactive power...
A novel control strategy based on the instantaneous power direct control for permanent magnet synchronous machine (PMSM) system is proposed. The control mechanism is firstly analyzed, and the influence of the instantaneous active and reactive power in torque and stator flux-linkage is explained in detail. The strategy of the direct power control by selecting the optimum voltage vector is then presented,...
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