Abstract

In the grid, uneven voltage and harmonics distortion are in most of the power quality issues in wind energy transformation system (WECS). To reduce the effect enrolled its various and THD distortion. The resonant current controller can individually realize the fundamental and harmonic current controllers and combined to form voltage command for a unified power quality conditioner (UPQC) based on superposition theorem. Not only the computing time but also the harmonic currents in the feeder can be effectively reduced along with the proposed approach. The analysis of compensation characteristics of different HPF (Hybrid Power Filters) configurations is carried out. The design of the control method is based on both the schemes of the hybrid filter, different control strategy and power circuit design are considered. The fundamental current and distribution system harmonic currents are independently controlled by a current detecting scheme. The elimination of harmonic current is performed by using hybrid power filters.

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