Variable constrained based LMS algorithm for power system harmonic estimation

Many algorithms have been proposed for harmonic estimation to improve the power quality performance but till today it is still a challenge for accurate estimation. In this paper an adaptive filtering algorithm called Variable Constrained based Least Mean Square (VCLMS) is applied for the first time for estimating harmonic parameters. The algorithm has been considered to estimate the amplitudes and phases in case of time varying power signals containing harmonics in the presence of White Gaussian Noise in MATLAB simulating environment. Also a comparison between a recently proposed algorithm i.e. Least Mean Square (LMS) are presented to show the effectiveness of the proposed VCLMS algorithm.