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Newton Method Based Harmonics Estimation and Elimination using LCL Filters


Y. Kalviarasi , Priyadarshini Engineering College, Vaniyambadi, Vellore, India; R. Rajeswari, Priyadarshini Engineering College, Vaniyambadi, Vellore, India


DC Source, Microgrid, Inverter, Matlab/Simulink Software, Various Loads


The main aim of this paper is to maintain the power quality parameters such as harmonics using LCL filter method after duly estimating the harmonics using newton raphson method. Harmonics are frequencies higher than the fundamental. There are two types of harmonics: even harmonics and odd harmonic. Fourier analysis could be used for decomposition of both types of harmonics. In this paper, a selective harmonic compensation scheme using the anti-harmonic injection and FFT is presented both for voltage and current. This method compensates for the preexisting grid background harmonics using the line current and voltage measurement and provides superior harmonic performance. In addition to the harmonics removal, power factor improvement is also carried out. The proposed method requires measuring the angle of the grid voltage harmonics. This PWM control scheme and further quality parameters have been verified by MATLAB models under version 2018 with power systems and power electronics tool boxes.

Other Details

Paper ID: IJSRDV8I20930
Published in: Volume : 8, Issue : 2
Publication Date: 01/05/2020
Page(s): 1169-1172

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