Abstract
An improved adaptive harmonic detector based on adaptive control theory was presented, and analyzed systematically. The proposed method conquers the limitation of the average adaptive harmonic detection methods and is able to detect harmonic as well as extract distortion of currents. The transient speed of the novel adaptive is improved through chose of learning rate. Due to its excellent tracking performance, the improved adaptive one is good at time-varying harmonic's detection. The simulation results show that the proposed approach is faster than the previous average one for synchronous detection of harmonic and extraction of fundamental component. The proposed method can satisfy the power system's needs for harmonic current or harmonic voltage detection.
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