Total Harmonics Distortion reduction using a new method of adaptive filtering

This paper presents a novel method to reduce the Total Harmonics Distortion (THD) using adaptive filters. Least Mean Square (LMS) and Normalized Lest Mean Square (NLMS) were used as adaptation algorithms. Both of these algorithms gave a very good performance in terms of distortion reduction. Instead of focusing on specific harmonics as in other methods of adaptive filtering, this method targets all the harmonics contained in the signal for elimination. A single phase inverter was used as a study case to test the performance of the proposed technique. The obtained results showed that the presented method can decrease the total harmonics distortion dramatically over time.