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The paper presents the direct power control of doubly fed induction generator (DFIG) under unbalanced and harmonically distorted grid voltage in the stationary frame. Two alternative control targets, the balanced and sinusoidal stator current injected into the power grid, or the smooth DFIG electromagnetic torque to ensure reliable DFIG mechanic parts operation, can be achieved. The complicated and...
This paper proposes an improved direct power control (DPC) strategy for a doubly fed induction generator (DFIG)-based wind power generation system under unbalanced grid voltage dips. The fundamental and double grid frequency power pulsations, which are produced by the transient unbalanced grid faults, are mathematically analyzed and accurately regulated. Five selectable control targets, with proper...
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