Abstract
Traditional control strategy for wind power converter is dual closed-loop under balanced voltages.With the development of the control theory. The problems of the wind power converter under unbalanced voltages have been considered. This paper analyzes the impact of wind power converter under unbalanced grid fault and propose a new control method.This improved method contains positive and negative sequence current trace under their own synchronous axis.The improved method has good performance under unbalanecd voltages.It shows regulation in DC voltage and sinusoidal in AC current.
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