A variable step-size LMS algorithm of harmonic current detection based on fuzzy inference

The working performance of the active power filter is dependent on harmonic current detection. Based on adaptive noise canceling technology, this paper improved the classic LMS algorithm ant got a fuzzy variable step-size LMS algorithm of harmonic current detection which uses the average estimation of error signal to control the updating of step-size by fuzzy inference. The algorithm has a fast response while ensuring high precision. The simulation results verify the effectiveness of this algorithm.